Scientific American: Dear EarthTalk: Three regions in California recently implemented transportation plans as part of a statewide strategy for cutting greenhouse gas emissions. Can you explain?--Bill Oakes, Reno, Nev.
Americans are becoming increasingly concerned about global warming even as Washington politicians continue to debate whether or not to mandate emissions cutbacks. In lieu of federal action, some states and municipalities are taking action on their own to reduce fossil fuel use and greenhouse gas emissions....