nitrous oxide

It's a silent but deadly source of greenhouse gases that contributes more to global warming than the entire world transportation sector, yet politicians almost never discuss it, and environmental lobbyists and other green activist groups seem unaware of its existence.That may be because it's tough to take cow flatulence seriously. But livestock emissions are no joke. 

Earthjustice, Oceana, Friends of the Earth, and the Center for Biological Diversity have joined forces in the fight to reduce global warming pollution from ships. Despite contributing to almost 3% of the world’s carbon dioxide, marine vessels’ emissions receive no regulation under the Kyoto Protocol. Their emissions include several global warming pollutants such as carbon dioxide, nitrous oxide, and black carbon. This coalition of environmental advocates filed a petition today with the U.S.