How does one city lower its carbon footprint by a third? It's simple—poop. By converting the methane gas from its sewer system into natural gas, the city of Portland, Oregon hopes to replace diesel fuel in many vehicles, including garbage trucks.
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Key Facts In This Video
Composting manure produces nitrous oxide and methane emissions, which are greenhouse gases that are 325 times more potent than carbon dioxide. 00:15
Advanced biofuels have more favorable fuel properties than ethanol. 00:56
Bacillus subtilis is a soil organism that can be engineered to produce alcohol biofuels. 01:49
How Poop Will Power The World
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