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It is a false choice that we must choose between cutting CO2 (the biggest long-term threat to the climate) and super pollutants like methane (that are far more potent at trapping heat in the shorter term). We must do both to sustain a livable climate.
A warming permafrost is "certain to trigger additional warming" through methane release, a new study finds, representing a dangerous amplifying carbon cycle feedback that threatens to lead to a catastrophic level of warming.