Household sewage is currently fueling cars in Sweden, and has for years. But Swedish industry has given up on the idea, investing in ethanol-based gasoline.
"Taking a road trip? Remember to visit the toilet first. This city is among dozens of municipalities in Sweden with facilities that transform sewage waste into enough biogas to run thousands of cars and buses.
Cars using biogas created a stir when they began to be rolled out on a large scale at the start of the decade. The tailpipe emissions are virtually odorless, the fuel is cheaper than gasoline and diesel, and the idea of recovering energy from toilet waste appealed to green-minded Swedes.
"When you're in the bathroom in the morning and you can see something good come of that, it's easy to be taken in by the idea - it's like a utopia," said Andreas Kask, a business consultant who drives a taxi in Goteborg. "But it hasn't worked out that well in reality.""
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FULL STORY: Sweden turning sewage into a gasoline substitute
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