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Jesse Ausubel: Nature is Rebounding

from Long Now [alt+shift+b] in science

### Why nature is rebounding Over the last 40 years, in nearly every field, human productivity has _decoupled_ from resource use, Ausubel began. Even though our prosperity and population continue to increase, the trends show _decreasing_ use of energy, water, land, material resources, and impact on natural systems (except the ocean). As a result we are seeing the beginnings of a global restoration of nature. America tends to be the leader in such trends, and the “American use of almost everything except information seems to be peaking, not because the resources are exhausted but because consumers changed consumption and producers changed production.“ Start with agriculture, which “has always been the greatest raper of nature.” Since 1940 yield has decoupled from acreage, and yet the rising yields have not required increasing inputs such as fertilizer, pesticides, or water. The yield from corn has become spectacular, and it is overwhelmingly our leading crop, but most of it is fed to cars and livestock rather than people. Corn acreage the size of Iowa is wasted on biofuels. An even greater proportion goes to cows and pigs for conversion to meat. The animals vary hugely in their efficiency at producing meat. If they were vehicles, we would say that “a steer gets about 12 miles per gallon, a pig 40, and a chicken 60.“ (In that scale a farmed fish gets 80 miles per gallon.) Since 1975 beef and pork consumption have leveled off while chicken consumption has soared. “The USA and the world are at _peak farmland,_ “ Ausubel declared, “not because of exhaustion of arable land, but because farmers are wildly successful in producing protein and calories.” Much more can be done. Ausubel pointed out that just reducing the one-third of the world’s food that is wasted, rolling out the highest-yield techniques worldwide, and abandoning biofuels would free up an area the size of India (1.2 million square miles) to return to nature. As for forests, nation after nation is going...
14th Jan 2015

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