How do I replace the evaporative emission system sensor in a Nissan Sentra? [more inside]
posted by quin on Nov 5, 2008 - 1 answer

Is it possible to say whether more methane is produced from cow feces or their mouths? How political is this topic? [more inside]
posted by beelover on Mar 7, 2008 - 16 answers

Given that, say, 100kg of fossil fuel is used in the making of a certain consumer product, I am interested in knowing - roughly - how much greenhouse gas emissions this might produce. Anyone know off-hand? [more inside]
posted by PercussivePaul on Jan 21, 2008 - 6 answers

Does anyone have opinions about Terra Pass? [more inside]
posted by of strange foe on Nov 16, 2006 - 4 answers

Is there anything I can do, without the help of a mechanic, to lower my car's NOx emissions by ~60ppm? [more inside]
posted by ParsonWreck on Jun 6, 2006 - 8 answers