RedOrbit: Reducing emissions of only soot and methane won`t do as much to reduce global warming as some previous research has suggested, according to a new study published Monday in the Proceedings of the National Academy of Sciences (PNAS). "Cutting back only on soot and methane emissions will help the climate, but not as much as previously thought," said study author Steve Smith, a climate researcher at the Department of Energy`s Pacific Northwest National Laboratory (PNL). The researchers advise focusing...