Ask Umbra
Grist’s destination for advice on life during climate change. Est. 2002
Past Umbra
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Umbra on speed limits
Dear Umbra, I was babbling about the ’70s energy crisis, gas rationing, and the nationwide 55 mile-per-hour speed limit at work the other day, and found myself explaining to a […]
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Umbra on why we shouldn’t waste energy
Dear Umbra, I am doing a big geography project at school on saving energy and recycling. My part is to comment on what will happen if we keep wasting energy. […]
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Umbra on offsetting emissions from flatulence
Dear Umbra, I was wondering if there is any information about the average CO2 emissions from human flatulence. My friend (and I really do mean my friend, I’m not just […]
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Umbra on biodiesel vs. straight veggie oil
Dear Umbra, I have the opportunity to convert a 1979 non-turbo Mercedes into a non-diesel. The question I have is: to which should I switch, biodiesel or vegetable oil? I […]
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Umbra on true hybrids
Dear Umbra, I read the New York Times article that reported auto manufacturers are using hybrid technology to boost power rather than improve mileage. It specifically mentioned the Honda Accord, […]
