So the immigration debate has heated up a bit again. Unfortunately, the "security pork in return for amnesty for illegal immigrants" monstrosity that is being debated in the Senate is a million miles from what I believe real immigration reform would look like, and is in fact so bad that I cannot even support it even though I love legal immigration and want far more of it. Below, I have summarized what kind of immigration reform bill we should be discussing.
1: Amend the 14th Amendment by adding the words "of an
American citizen" after the word "born" in Section 1. Only children of
American citizens should automatically qualify for American citizenship
under the Constitution. As a matter of policy, children of permanent
residents should also qualify almost automatically, but this should be
at our discretion. Jus soli "birthright" citizenship is at the
core of our immigration problem, and is a policy which almost all
nations have rejected as being impractical and abusive. The rest of my
plan would only go into effect on passage of the amending amendment.
2:
A national ID policy. Our fragmented system makes enforcing immigration
laws difficult, as well as mucking up voting and facilitating fraud.
This would be coupled with a national voter ID law once the IDs were nearly universally in place.
3: A path to permanent residency
for current illegal immigrants. This should be slower than the path for
legal immigrants, and come with substantial fines in the form of
something like a 10% payroll tax for ten years. The current Senate bill
has fines, but they are so small (~$2000) that they aren't any higher
than the application fees and legal bills illegal immigrants skipped out
on. As part of the amnesty deal, these folks would forgo any chance at
citizenship.
4: A 50% increase in the number of green
cards awarded every year, to approximately 1.5 million. This would
include the reinstatement of the green card lottery. The remainder would
be granted on a points-based system that considered skills, age,
education, income, family connections to the US, English skill, and time
previously spent in the US.
5: Work visas would be
sold, not granted. Each month, a fixed number of 3, 6, 12, 24, and 36
month visas would be auctioned off. Obviously, passing a security screen
would be required before placing bids. Once won, the visa could be
activated any time within the next year and last as long as noted.
Bidding for new visas while under a current one would be allowed, thus
making it possible for someone to stay in the US indefinitely if they
are willing to pay for it and obey our laws. This would cause the price
of residency to be bid up high enough that there would be little
advantage in "importing" cheap foreign workers. It would also ensure
that the companies that really needed to bring over some guru for a
rotation in the US would have little trouble doing so. Note that under
this system, H1B's would no longer exist. Immigrants who won work visas
would be free to work for any employer during the period of their visa,
or not work at all.
6: Use the several billion dollars
per year generated above to speed up USCIS processing times and iron
out any inconveniences that it inflicts on immigrants due to lack of
funds (such as the inability to do biometrics processing overseas).
7:
Get rid of the "travel permit" system. In a modern world, USCIS should
recognize that immigrants to America will often need to move about the
globe. As long as the immigrants are paying their taxes and obeying the
laws of both the US and whatever country they find themselves in, USCIS
shouldn't bother them...and certainly shouldn't force them to come back
to the US repeatedly at USCIS's whim, as is the case now. Additionally,
any US immigrant who is abroad for any length of time should be
considered to be maintaining their US immigration status if they are
living with their American citizen spouse or child, or if they or their
spouse is working for an American company or its international
affiliate. Currently, such people are constantly threatened with having
their immigration status revoked for "abandonment", requiring them to
repeatedly travel back to the US and spend a fortune on legal fees (it
cost my wife and I, as well as my employer, something like $20,000!).
8:
Family-based visas should include a temporary work permit and a Social
Security card. Currently, these people arrive in the US and are promptly
forcably unemployed, as they can't work in the US until their work
permit application comes through in 3-4 months, and they can't leave the
country without voiding their green card application. This is just a
waste of human capital.
9: Get tough on illegal
immigrants and their employers. Rapid deportation should be the norm for
the former, and crushing fines the norm for the latter. Illegal
immigrants and their children should qualify for almost no public
services, including schooling or identification.
10: Increased border security...to the extent Republicans are willing to raise taxes to pay for it, and not one penny more.
There. Plenty of pain on both sides...but everybody wins except future illegal immigrants.
Saturday, February 8, 2014
Thursday, February 6, 2014
An Open Letter to Eric Holthaus, or Why I Offset
I have been a regular purchaser of carbon offsets for the last eight years or so, specifically from TerraPass, though they are not the only acceptable provider. I do this because I cannot find it morally acceptable to leave the world in a worse condition than I found it. It is my responsibility to clean up the messes I make, even if that costs me a hundred bucks a year or so.
I was quite dismayed, however, to read prominent science writer Eric Holthaus's article in Slate earlier this week, where he discussed how, instead of flying like a rational person, he road a bus from Madison to Atlanta in order to attend an academic meeting, wasting essentially two days of his valuable time, all to save an estimated emissions of 1200 lbs of carbon dioxide. This can be offset via TerrPass for under ten dollars. Yep, Eric wasted two days of his time rather than spend ten bucks. Why? Because, to quote Eric, "I don’t believe in offsets". He then links to a debate about the quality of offsets that offers no conclusion, nor is particularly relevant anyway is it is a discussion about the UN's Clean Development Mechanism and related international treaties, not the small individual market. But even in the former case of the slow treaty process, independent audits have not been bad, finding that over 90% of offsets are real and "additional" - in other words, are not something that would have have happened anyway. Oddly, famous climate blogger Joe Romm cites the same article as evidence against offsets, linking it with a highly misleading lede. I normally like Joe, but on that day he let his hatred of "rip-offsets" as he calls them get the better of him.
In the case of private organizations, however, there is even less reason to doubt their work. TerraPass, with which I am most familiar, is completely transparent about its present and futures projects, providing long comment periods before accepting them, and routine audits by both TerraPass staff and independent auditors to ensure that emission reductions are being measured properly. Their business critically depends on transparency and they provide it in spades.
Which brings me back to Holthaus. Despite his herculean and largely pointless efforts, he still emitted over 300 lbs of carbon for the transportation portion trip. Since he didn't offset them, obviously his total was +300 lbs for the transportation segment of the trip. Now let's compare that to my upcoming trip to Australia, which TerraPass realistically estimates at 4600 lbs of carbon. In response to this, I will purchase 6000 lbs of offsets for less than $40. I always over-purchase a bit precisely because I worry that TerraPass (or any provider) is not perfect, and I want to keep sure I am in the right side of things. Even if you assume that TerraPass is only 80% effective, which is lower than there is any reason to believe, I would still be -200 lbs for the trip, 500 lbs less than Holthaus for our respective trips.
In my opinion, folks like Holthaus and Romm are letting the perfect be the enemy of the good, and in doing so, causing a lot of harm. It is simply too painful, in our world designed with high environmental impact infrastructure and economic systems, to live a very low impact lifestyle. Radicals aside, people won't do it. Even crusaders like Holthaus and Romm fall far short of perfection. However, a lot of people can be convinced to pay a bit of money to offset the messes they make, and a few dollars can be highly beneficial here. Claiming that offsets are not perfect enough or pure enough or direct enough will certainly push people away from buying them. However, imagining that these people Eric and Joe pushed away from buying them will then magically decide to drastically and directly reduce their environmental impact instead is wishful thinking.
For me, it is pretty simple. I am pretty low impact (living in Japan will do that to you), and I offset about 120% of the rest, just to be safe. Odds are I am pretty close to carbon neutral, give or take a few percent. Folks like Holthaus, in contrast, have no hope but to be substantially carbon positive given their current courses of actions. Worse yet, they are convincing other people to follow their lead in the wrong direction.
........
Post-script: For the record, I do not offset work-related activity. I offset what I consume, not what I produce. To do both would be to double-count. Also note that my upcoming set of flights is only the ninth set of my life that was not business-related. I am certainly not a million miler.
I was quite dismayed, however, to read prominent science writer Eric Holthaus's article in Slate earlier this week, where he discussed how, instead of flying like a rational person, he road a bus from Madison to Atlanta in order to attend an academic meeting, wasting essentially two days of his valuable time, all to save an estimated emissions of 1200 lbs of carbon dioxide. This can be offset via TerrPass for under ten dollars. Yep, Eric wasted two days of his time rather than spend ten bucks. Why? Because, to quote Eric, "I don’t believe in offsets". He then links to a debate about the quality of offsets that offers no conclusion, nor is particularly relevant anyway is it is a discussion about the UN's Clean Development Mechanism and related international treaties, not the small individual market. But even in the former case of the slow treaty process, independent audits have not been bad, finding that over 90% of offsets are real and "additional" - in other words, are not something that would have have happened anyway. Oddly, famous climate blogger Joe Romm cites the same article as evidence against offsets, linking it with a highly misleading lede. I normally like Joe, but on that day he let his hatred of "rip-offsets" as he calls them get the better of him.
In the case of private organizations, however, there is even less reason to doubt their work. TerraPass, with which I am most familiar, is completely transparent about its present and futures projects, providing long comment periods before accepting them, and routine audits by both TerraPass staff and independent auditors to ensure that emission reductions are being measured properly. Their business critically depends on transparency and they provide it in spades.
Which brings me back to Holthaus. Despite his herculean and largely pointless efforts, he still emitted over 300 lbs of carbon for the transportation portion trip. Since he didn't offset them, obviously his total was +300 lbs for the transportation segment of the trip. Now let's compare that to my upcoming trip to Australia, which TerraPass realistically estimates at 4600 lbs of carbon. In response to this, I will purchase 6000 lbs of offsets for less than $40. I always over-purchase a bit precisely because I worry that TerraPass (or any provider) is not perfect, and I want to keep sure I am in the right side of things. Even if you assume that TerraPass is only 80% effective, which is lower than there is any reason to believe, I would still be -200 lbs for the trip, 500 lbs less than Holthaus for our respective trips.
In my opinion, folks like Holthaus and Romm are letting the perfect be the enemy of the good, and in doing so, causing a lot of harm. It is simply too painful, in our world designed with high environmental impact infrastructure and economic systems, to live a very low impact lifestyle. Radicals aside, people won't do it. Even crusaders like Holthaus and Romm fall far short of perfection. However, a lot of people can be convinced to pay a bit of money to offset the messes they make, and a few dollars can be highly beneficial here. Claiming that offsets are not perfect enough or pure enough or direct enough will certainly push people away from buying them. However, imagining that these people Eric and Joe pushed away from buying them will then magically decide to drastically and directly reduce their environmental impact instead is wishful thinking.
For me, it is pretty simple. I am pretty low impact (living in Japan will do that to you), and I offset about 120% of the rest, just to be safe. Odds are I am pretty close to carbon neutral, give or take a few percent. Folks like Holthaus, in contrast, have no hope but to be substantially carbon positive given their current courses of actions. Worse yet, they are convincing other people to follow their lead in the wrong direction.
........
Post-script: For the record, I do not offset work-related activity. I offset what I consume, not what I produce. To do both would be to double-count. Also note that my upcoming set of flights is only the ninth set of my life that was not business-related. I am certainly not a million miler.
Saturday, December 14, 2013
Baby Offsets
One argument I often hear from my environmentalist friends is that overpopulation is a big problem, and therefore they are generously foregoing having children for the sake of the environment. I don't believe them.
First, as I noted earlier this month, the maximum sustainable population of the earth is far, far higher than either our current population of just over seven billion, or the UN's prediction of around eleven billion at century's end. Given declining fertility rates, something around the latter figure is likely to be our maximum population unless there is some drastic political or economic shift. It is clear that from a physical and biological point of view, our population will never reach its constraints. Any ceiling on our population is instead defined by poor political policy and human ignorance, which lead to inefficiency and waste.
Second, even if overpopulation were a problem, there is a simple solution - baby offsets. What are they? Well, they work just like carbon offsets, of which I am an annual purchaser, and highly recommend. With carbon offsets, you pay a qualify provider an amount based on your personal emissions, and they use the money to fund clean energy sources, focusing as best they can on ensuring they are additional and not just paying someone to do what they would have done anyway, in an amount sufficient to offset any emissions you made.
Baby offsets work the same way, but instead of carbon offset providers like Terrapass or Native Energy (both recommended), you donate your money to a good international family planning organization instead, such as Pathfinder International. It takes about $100 for such organizations to prevent one unintended pregnacy in a developing country, so even if you assume that your child will be a typical American and pollute far more than the world average, you can simply donate $1000-$2000 and be sure that the net impact of your actions is an environmental and social positive. Better yet, teach your children to be a friends of the environment rather than typical American pigs, and make it a win-win situation! And before you ask, if you don't have a couple grand to spare, you probably aren't ready to have kids anway. $2000 is much, much less than the several hundred thousand your potential child is going to cost you over the coming years. In any case, it would be fair to pay for the offsets over time, say $100 per year, rather than as a lump sum.
So there you go, my environmenatlists friends. Have all the children you want. There is plenty of room, and offsetting any messes they make is easy.
.....
Post-script: Strangely, every time I bring this up with environmentalists they get a bit huffy. It is almost as if they didn't really want stinky, annoying, extremely expensive children in the first place, and were just engaging in the time-honored tradition of rationalizing their self-interest as an act of sacrifice. Who would have guessed...
First, as I noted earlier this month, the maximum sustainable population of the earth is far, far higher than either our current population of just over seven billion, or the UN's prediction of around eleven billion at century's end. Given declining fertility rates, something around the latter figure is likely to be our maximum population unless there is some drastic political or economic shift. It is clear that from a physical and biological point of view, our population will never reach its constraints. Any ceiling on our population is instead defined by poor political policy and human ignorance, which lead to inefficiency and waste.
Second, even if overpopulation were a problem, there is a simple solution - baby offsets. What are they? Well, they work just like carbon offsets, of which I am an annual purchaser, and highly recommend. With carbon offsets, you pay a qualify provider an amount based on your personal emissions, and they use the money to fund clean energy sources, focusing as best they can on ensuring they are additional and not just paying someone to do what they would have done anyway, in an amount sufficient to offset any emissions you made.
Baby offsets work the same way, but instead of carbon offset providers like Terrapass or Native Energy (both recommended), you donate your money to a good international family planning organization instead, such as Pathfinder International. It takes about $100 for such organizations to prevent one unintended pregnacy in a developing country, so even if you assume that your child will be a typical American and pollute far more than the world average, you can simply donate $1000-$2000 and be sure that the net impact of your actions is an environmental and social positive. Better yet, teach your children to be a friends of the environment rather than typical American pigs, and make it a win-win situation! And before you ask, if you don't have a couple grand to spare, you probably aren't ready to have kids anway. $2000 is much, much less than the several hundred thousand your potential child is going to cost you over the coming years. In any case, it would be fair to pay for the offsets over time, say $100 per year, rather than as a lump sum.
So there you go, my environmenatlists friends. Have all the children you want. There is plenty of room, and offsetting any messes they make is easy.
.....
Post-script: Strangely, every time I bring this up with environmentalists they get a bit huffy. It is almost as if they didn't really want stinky, annoying, extremely expensive children in the first place, and were just engaging in the time-honored tradition of rationalizing their self-interest as an act of sacrifice. Who would have guessed...
Wednesday, December 4, 2013
So I lost my health insurance today...
Yep, I "lost" "my" health insurance today. It's annual enrollment time at work! I had a whopping three options, one of which was pretty similar to the one I had this year. It'll be disappearing next year, though, and I will have to switch to a quite different plan. None of this has to do with the PPACA ("Obamacare"), of course. In fact, the law caused several positive changes in our coverage. Price increases were modest with respect to other years.
Now let's compare my hideous, awful, evil situation, which is pretty much what everyone who has employer based insurance experiences almost every year, with those poor, woeful 5,000,000 or so souls who received cancellations from their insurer and have now "lost" "their" insurance...you know, the ones Republicans are screaming bloody murder about?
Well, if they happen to be 38-year-old males residing in Ohio, like myself, they would have thirty or more choices of plans, easily found by going to sites like ehealthinsurance.com or even the now mostly-functional healthcare.gov. I happen to know how much my employer spends on health care per employee, and trust me, the prices at either of these places are very comparable to the gold/silver plan my employer provides. And of course, acceptance in these plans is guaranteed, thanks to the PPACA. They aren't the old bait-and-switch that only healthy 23-year-olds actually qualified for, which was the norm before this year.
As far as I can tell, the five million folks who have "lost" "their" insurance due to the PPACA actually have it at least as good if not better than I do, and I have what is considered good employer insurance. As always, this matter is just a tempest in a teapot. Yes, a few people will have to pay more (for generally better insurance), but just as many or more will pay less. The ACA did not re-invent actuarial tables, so while costs might get shuffled around a bit, the total remains the same.
While the PPACA is vastly less preferable than Medicare for All, or even VA for All, it is certainly better than what it replaced. It is time for Republicans to quit trying to sabotage the ship and start helping to polish it.
Now let's compare my hideous, awful, evil situation, which is pretty much what everyone who has employer based insurance experiences almost every year, with those poor, woeful 5,000,000 or so souls who received cancellations from their insurer and have now "lost" "their" insurance...you know, the ones Republicans are screaming bloody murder about?
Well, if they happen to be 38-year-old males residing in Ohio, like myself, they would have thirty or more choices of plans, easily found by going to sites like ehealthinsurance.com or even the now mostly-functional healthcare.gov. I happen to know how much my employer spends on health care per employee, and trust me, the prices at either of these places are very comparable to the gold/silver plan my employer provides. And of course, acceptance in these plans is guaranteed, thanks to the PPACA. They aren't the old bait-and-switch that only healthy 23-year-olds actually qualified for, which was the norm before this year.
As far as I can tell, the five million folks who have "lost" "their" insurance due to the PPACA actually have it at least as good if not better than I do, and I have what is considered good employer insurance. As always, this matter is just a tempest in a teapot. Yes, a few people will have to pay more (for generally better insurance), but just as many or more will pay less. The ACA did not re-invent actuarial tables, so while costs might get shuffled around a bit, the total remains the same.
While the PPACA is vastly less preferable than Medicare for All, or even VA for All, it is certainly better than what it replaced. It is time for Republicans to quit trying to sabotage the ship and start helping to polish it.
Sunday, November 24, 2013
People, People Everywhere!
Yesterday, I posted my thoughts on the maximum sustainable human population, given current technology and land forms. But what if we got rid of those constraints and made some plausible guesses about future technology? How high can we go from 25 billion?
The biggest improvement would come from increasing crop yields. Yesterday's assumptions were a mostly vegetarian diet produced with modern organic yields. However, crop yields are slowly and steadily increasing, including organic at places like Rodale Intitute, a leading organic research farm. Additionally, if you combined organic with genetically modified organisms and otherwise got rid of some of the anti-scientific elements of the organic movement, it is easy to imagine increasing crop yields significantly.
There are other potential tricks up our sleeve as well. For example, climate change will have a mixed effect on crop yields, as CO2 fertilization battles it out with water stress and desertification. If we can mitigate the latter, crop yields for many staples could increase by 10-15%. Or we could get more wild, and used space-based reflectors to alter seasons, cooling the equatorial regions and warming the arctic areas in particular, perhaps by lengthening the evenings in the cooler half of the year. This would result in longer growing seasons (or multiple seasons) than is the current case, increasing yields. We could also engage in cloud seeding and increase rainfall in areas that are water-constrained. All in all, we might be able to increase crop yields by a third or half relative to modern organic practice, feeding an extra 8-12 billion, on current land.
Also, fungi are a possible food source that I did not mention yesterday. They can be grown underground using forest waste as their food source, providing us with just a bit more food. Another trick we might use is ocean fertilization, to increase the productivity of the oceans by seeding the relatively dead areas with the minerals that are constraining biological activity. Of course, land reclamation from the ocean is also possible in some places. This land could be used either for farming directly or more likely, used for living space, freeing up interior lands for farming. Synthetic foods are another real possibility, and may beat out photosynthesis on a total energy basis. If this were ever successful, the maximum population could be substantially higher. It is almost impossible to estimate at this point, however.
If solar PV efficiency increases (and it will), naturally less land will be used. So yesterday's land use assumptions were unnecessarily pessimistic, and the reality would be that some of the land assigned to PV could be reassigned to food production. Also note that we can (and do) get some of our energy from other renewable sources such as hydro, wind, tidal, and geothermal, which are more space efficient. Ignoring these made yesterday's estimates too high. Likewise, I assumed that the new population would live on the same land as we are currently using, but if we wanted to, we could go even higher density than that. It is certainly possible, and this would reclaim more land - often prime farm land - for food production. On top of all this, wide-scale terraforming is possible. Much of the marginal land that was assigned as "Other" or meadows or unfarmable forest is unfarmable precisely because it is hilly. We have bulldozers, and lots of time, making it possible to reclaim some of this land for productive use.
Oh, and there is no reason we cannot change ourselves. Using genetic engineering, we could make ourselves smaller and select for the most energy efficient among us, cutting our caloric needs dramatically.
Combining all this, I can certainly imagine something like 40 or even 50 billion people living on earth, in a sustainable manner, with a level of comfort similar to that of the citizens of modern industrial economies.
The biggest improvement would come from increasing crop yields. Yesterday's assumptions were a mostly vegetarian diet produced with modern organic yields. However, crop yields are slowly and steadily increasing, including organic at places like Rodale Intitute, a leading organic research farm. Additionally, if you combined organic with genetically modified organisms and otherwise got rid of some of the anti-scientific elements of the organic movement, it is easy to imagine increasing crop yields significantly.
There are other potential tricks up our sleeve as well. For example, climate change will have a mixed effect on crop yields, as CO2 fertilization battles it out with water stress and desertification. If we can mitigate the latter, crop yields for many staples could increase by 10-15%. Or we could get more wild, and used space-based reflectors to alter seasons, cooling the equatorial regions and warming the arctic areas in particular, perhaps by lengthening the evenings in the cooler half of the year. This would result in longer growing seasons (or multiple seasons) than is the current case, increasing yields. We could also engage in cloud seeding and increase rainfall in areas that are water-constrained. All in all, we might be able to increase crop yields by a third or half relative to modern organic practice, feeding an extra 8-12 billion, on current land.
Also, fungi are a possible food source that I did not mention yesterday. They can be grown underground using forest waste as their food source, providing us with just a bit more food. Another trick we might use is ocean fertilization, to increase the productivity of the oceans by seeding the relatively dead areas with the minerals that are constraining biological activity. Of course, land reclamation from the ocean is also possible in some places. This land could be used either for farming directly or more likely, used for living space, freeing up interior lands for farming. Synthetic foods are another real possibility, and may beat out photosynthesis on a total energy basis. If this were ever successful, the maximum population could be substantially higher. It is almost impossible to estimate at this point, however.
If solar PV efficiency increases (and it will), naturally less land will be used. So yesterday's land use assumptions were unnecessarily pessimistic, and the reality would be that some of the land assigned to PV could be reassigned to food production. Also note that we can (and do) get some of our energy from other renewable sources such as hydro, wind, tidal, and geothermal, which are more space efficient. Ignoring these made yesterday's estimates too high. Likewise, I assumed that the new population would live on the same land as we are currently using, but if we wanted to, we could go even higher density than that. It is certainly possible, and this would reclaim more land - often prime farm land - for food production. On top of all this, wide-scale terraforming is possible. Much of the marginal land that was assigned as "Other" or meadows or unfarmable forest is unfarmable precisely because it is hilly. We have bulldozers, and lots of time, making it possible to reclaim some of this land for productive use.
Oh, and there is no reason we cannot change ourselves. Using genetic engineering, we could make ourselves smaller and select for the most energy efficient among us, cutting our caloric needs dramatically.
Combining all this, I can certainly imagine something like 40 or even 50 billion people living on earth, in a sustainable manner, with a level of comfort similar to that of the citizens of modern industrial economies.
Saturday, November 23, 2013
To 25 Billion...and beyond!
What is the maximum number of people that could live in reasonable comfort on earth in a sustainable manner? It really depends on how you frame the question and the assumptions you make, but for the moment, my assumptions are current technology applied optimally (in other words, ignoring political restraints). The answer is probably a lot higher than you think.
Fundamentally, it boils down to land, food production, and energy production. The current distribution of our 32.4 billion acres of land looks something like this:
Fundamentally, it boils down to land, food production, and energy production. The current distribution of our 32.4 billion acres of land looks something like this:
Over a third of the world is still covered in forest. Only a ninth is actively farmed. Our buildings, roads, and other human features only physically occupy a bit over one percent. Over 40% is covered with grasslands, scrub, or meadows of various quality, much of which is used for grazing. The remaining 16% is mountains, rocks, and ice. This land currently supports our population of 7.1 billion, but most certainly not in a sustainable manner. Can we do better?
Let's assume a world of 25 billion people. This article finds that crops based around a balanced, various and healthy vegetarian diet yield a combined yield of 2.4 million calories per acre using mostly organic techniques. Assuming 3000 calories per day per person (2000-2500 actually consumed, plus waste and spoilage), an increase in cropland from 11% to 35% (11.4 billion acres) would be required. Is this possible? Yes it is. In fact, only a fraction of the world's farmable land is actually farmed. This source indicates that there are actually 10.3 billion arable acres available, close to our 25 billion person target of 11.4 billion. It is fair to assume that we can grow, raise, or harvest 10% of our crops on non-arable land. For example, greenhouses for raising vegetables, or sustainably raised meat. Most of this new farm land would be found in the currently forested parts of the world, with smaller amounts coming from the grasslands, scrublands, pastures and meadows.
As for meat, we could no longer consume as we currently do, as we spend several calories of grain to make one calorie of meat. Obviously, in the 25 billion person world, every calorie counts. However, if we were to use half of the grasslands, scrublands, meadows and pastures for grazing, we could raise about half a billion head of grass-fed cattle (or equivalent weights of sheep or other animals), enough to provide each person with about 35 lbs of meat per year. Additionally, with diligent attention and management, we probably can harvest about ten pounds of fish per person each year. This would represent only about 80% of current production, which is clearly unsustainable.
What about energy? Assuming an entirely solar photovoltaic system, energy production averages 5-20 W/m2 depending on location. To provide everyone with 200 GJ per year (above the average Japanese, below the average American), and assuming we can average 15 W/m2 by placing most of our solar panels in the sunny deserts, it would require 2.6 billion acres to provide power to all 25 billion people. This is about 8% of the world's surface, the majority of which would come from the "other" wasteland category, scrub lands, or even piggy-backing on rooftops on developed land.
How about wood, cotton, and other fibers? For wood, the average American consume 1900 kg per person per year. Assuming we can cut that down to 700 kg of bamboo and 500 kg of hardwood, at 44000 kg and 6600 kg of wood/acre/year respectively, we would have to intensively tree farm about 2.3 billion acres, or 7% of the world's surface. Likewise, at current American cotton consumption of 3.3 kg per year and production rates of 700 kg per acre, about 100 million acres would need to be diverted to cotton production. Another 100 million would be required for other fiber or industrial crops. This amounts to 0.6% of the world's surface, which we can include in the cropland category.
So what does the distribution of land use look like after we make these changes?
Obviously, there are some things not to like. Half of the world's forest cover would be gone, and nearly half of what remains would be intensively managed. Somewhere between a quarter and a half of the other natural land types would be consumed as well, and half of the remaining lands potentially useful for grazing would be used as such. Less than a third of the world would be unused. However, that is more than you might think: only around 10-15% of the earth's land is currently protected as parks, national forests, or the like, so if this unused third was distributed intelligently, there would be plenty of natural areas accessible to people for recreation and at least a bare minimum for wildlife to continue to exist. This is obviously sub-optimal from this respect, but there is no way to achieve a high human population that doesn't demand sacrifices.
So yes, there is nothing stopping us from having a dramatically higher population than we currently do, or are ever projected to have, other than our own stupidity. Unfortunately, that is a vast mountain to climb.
Sunday, November 10, 2013
On Gerrymandering...
Gerrymandering - the process of drawing political districts in such a manner as to favor your political party - is an abhorrent abomination and its existence representative of a major flaw in our Constitution. At the US Congressional level, it has become so bad that Republicans were able to capture a solid majority of seats while getting fewer votes than Democrats. One question that came to my mind was to ask how common such an occurrence was, so I dug up the data going back to the WWII era (via Wikipedia), and combined it below.
In the 34 election cycles represented, only three times - 1952, 1996, and 2012, did a party win a majority of seats without winning the two-party vote. All three times favored Republicans. On only three other occasions (1994, 2008, 2010) did the party that won the two-party vote receive a smaller share of seats than share of votes (1994 pro-Democrat, 2008/10 pro-Republican). You would expect this to be rare in a winner-take-all districting system. Indeed, if people were distributed homogenously with respect to partisanship, 50.1% of the vote would be enough to capture every seat! Clearly, we are not distributed homogenously, so the minority party still receives substantial representation. However, in 28/34 elections, they have won fewer seats than their share of the vote.
So is there evidence of gerrymandering in that data? Yes, substantially evidence in fact, with a huge turning point coming in 1994. I have plotted share of vote versus share of seats below, split before and after the "Republican Revolution" of 1994.
Prior to 1994, there was clearly a pro-Democratic bias to the data, with Democrats receiving approximately 24 more seats than Republicans for the same share of votes. However, Democrats were winning those elections by substantial margins and basically this amounted to padding their already formidable lead. At no point did they ever steal control of the House. In fact during this stretch, Republicans managed to swipe one election.
In contrast, a sea change occurred in 1994. Not only did Republicans start winning elections, but the gerrymandering flipped in their favor, with an approximate 14 seat advantage since that time. A careful look at the data reveals something else as well: the slopes of the lines have changed significantly. Prior to 1994, a 1% change in the vote resulted in a shift of about 7.9 seats. Post 1994, this has shifted to only 3.7 seats, implying that incumbents are much more heavily protected than they used to be. This also implies that Republican's 14 seat advantage is actually harder to dislodge than the old 24-seat Democratic advantage, because the latter could be beaten with a 3% vote advantage while the current Republican advantage would take a 4% victory to defeat. In fact, it is likely worse than that now. The 2012 election, which occurred after very favorable redistricting for Republicans, resulted in Republicans capturing 234 seats vs a predicted 214 for the model, an over-performance of 20 seats. This districting, which is largely fixed until the 2022 elections, could be giving Republicans as much as a 6% advantage in the vote, implying Democrats would need to capture around 53% of the total vote just to win a bare majority. At no time in our modern history has such a wide gap existed.
I find it ironic that the Founder's will has been flipped on its head. Originally, Senators were chosen by the state legislatures, and Representatives, in accordance with the Constitution, were chosen by the people. The 17th amendment resulted in direct election of Senators by the people, but gerrymandering has largely caused the House election to be controlled by the state legislatures who draw the districts!
I call on all my fellow citizens to help end the practice of gerrymandering, by taking districting out of patently partisan hands and moving it to a commission-based model that has been successful in a number of states with respect to drawing more compact, fairer, and more competitive districts.
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