Recycled Biofuel

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57031182_68ca6da51a.jpg A better way to grow biofuel crops is to re-use abandoned agricultural lands. Or farmlands that are less productive. Both are better than current practises: clearing wilderness and converting food farms to energy farms.

There are 1.5 million square miles of abandoned cropland and pastureland available around the world. Energy crops raised on these could yield up to 27 exajoules of energy a year—equal to 172 million barrels of oil. Yet even this would still satisfy only about 5% of global primary energy consumption—483 exajoules in 2005, and rising.

Better than nothing, you say. But only if it doesn’t further aggravate climate change. The study by Carnegie Institution and Stanford University scientists used historical data, satellite imagery, and productivity models to estimate how to maximize the benefits from biofuels while also mitigating global warming. Recycling old farms yields the best atmospheric returns.

Julia Whitty is Mother Jones’ environmental correspondent, lecturer, and 2008 winner of the Kiriyama Prize and the John Burroughs Medal Award.

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Fact:

In-depth journalism that investigates the powerful takes real money and is so damn important right now.But it doesn’t take a Mother Jones investigation to know that billionaires and corporations will never fund the type of reporting (like they do politicians) we do that exists to help bring about change. Instead, our mission-driven journalism is made possible by people power, and has been for 46 years now since our founding as a non-profit.

In “TITLE TK” Monica Bauerlein writes about the perilous moment we’re in, and why it’s so important that we raise $325,000 by the time November’s midterms are decided so we can be ready to throw everything we have at the big issues facing the nation no matter what happens. Please help MoJo’s people-powered journalism with a donation today.

$400,000 to go!

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