06 Apr 2015:
Millions of Acres of Grasslands
Cleared For Biofuel Crops, Study Finds
Soybeans are a source of biodiesel fuel.
Biofuel crops expanded onto 7 million acres of new land in the U.S. over a recent four-year period, replacing millions of acres of grasslands, according to
new research from the University of Wisconsin. Using high-resolution satellite imagery, the researchers calculated that converting grasslands to croplands for corn and soy biofuels could have emitted as much carbon dioxide as 34 coal-fired power plants operating for one year, or the equivalent of an additional 28 million cars on the road. Nearly 80 percent of cropland expansion replaced grasslands, which store large amounts of carbon in their soils. Among them were 1.6 million acres of undisturbed natural grassland, equivalent in area to the state of Delaware, according to the report published in Environmental Research Letters
. The study is the first comprehensive analysis of land-use change across the U.S. between 2008 and 2012, following the passage of the federal Renewable Fuel Standard. The law says that biofuels are supposed to be grown on existing cropland, but current federal monitoring efforts capture only national-level, aggregate land-use changes.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
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Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.