Next to landfills, enteric fermentation in domestic livestock is the highest producer of atmospheric methane, a major contributor to global warming. Enteric fermentation is a digestive process by which microbes break down feed consumed by animals.
Greenhouse gases are the driving force behind global warming.
But practical solutions abound to reduce these emissions and slow Earth's warming trend, according to a report from scientists at NASA's Goddard Institute for Space Studies. An Alternative Scenario. It makes a lot of sense to try to reduce these gases because, in some ways, it's easier and some have undesirable effects. Tropospheric air pollution is harmful to human health and agricultural productivity. Hansen isn't ready to let carbon dioxide off the hook, however.