10 Sep 2008:
San Antonio Is First U.S. City
To Convert Human Waste to Methane Gas
San Antonio has signed a contract with a Massachusetts company to collect the methane produced by processing the Texas city’s human waste
and sell it to utility companies to burn and produce electricity. Although some U.S. communities have collected smaller amounts of methane from sewage to power waste treatment plants, this is the first time that an American city will be collecting gases from human waste on a large scale to sell to utilities. Under the new plan, more than 90 percent of the human waste flushed down San Antonio’s toilets will be recycled. The city will use the liquid for irrigation, the solids to produce compost, and the gases for energy generation. Sewage gases are similar to natural gas, which is primarily composed of methane.
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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.
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The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
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.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.