The Post?s editorial series on climate change made valid and important points [?A climate for change,? Aug. 25 through Aug. 29]. In particular: The problem is real, important and urgent. And applying the principles of Economics 101 is an effective and efficient response ? if only politics didn?t get in the way. But the series did a disservice by reinforcing the widespread but wrong perception that the source of the problem is carbon dioxide emissions and that alone. In fact, there are other greenhouse gases. Most important is methane, many times more potent in trapping heat than carbon, especially in the relatively short term. Releases of methane in the course of mining, transporting and burning gas and in raising livestock is a huge global problem, so much so that switching from coal and oil to gas may be of very little benefit from a climate change perspective.

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