By Anthony Domanico A bus in the UK is fueled by biomethane gas, which is produced by both food and human waste. But how bad does it actually smell?

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/40b7e37f/sc/31/l/0L0Scnet0N0Cnews0Call0Eaboard0Ethe0Epoop0Ebus0Enow0Efarting0Earound0Eengland0C0Tftag0FCAD590Aa51e/story01.htm