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Global warming has gone to the bogs | csmonitor.com: "Forget the melting glaciers. Global warming is revealing itself in subtler ways. Think methane. Swedish bogs are releasing more methane as climate warms and permafrost melts. Methane is a potent greenhouse gas with 25 times the heat-trapping power of carbon dioxide (CO2). With more methane in the air, climate warming could accelerate. "