For decades the primary way environmentalists concerned about manmade global warming have advocated to slow it has been to reduce human emissions of the “greenhouse gas” carbon dioxide (mainly from burning coal, oil, and natural gas for energy). Lately they have focused increasingly on contributions from two other “greenhouse gases,” primarily from agriculture—methane (CH4) from livestock flatulence, and nitrous oxide (N2O) from chemical fertilizers. Why? Because CH4’s forcing effect (the … [Read more...]