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Effect of methane on climate change could be 25% greater than we thought

The scientists calculated that, while carbon dioxide remains by far the most significant gas driving human-induced climate change, methane, while much less abundant, is even more potent than previously thought. They found that a one tonne emission of methane has the equivalent warming effect of 32 tonnes of carbon dioxide – up from the previous estimate of 28.While previous studies have focused on the role of methane in greenhouse trapping of the infrared energy emitted by the Earth and its atmosphere, this new study also took into account the way methane absorbs energy from the sun, at shorter wavelengths. It shows that much of the extra absorption is in the lower part of the atmosphere, where it has a warming effect.

Source: Effect of methane on climate change could be 25% greater than we thought

Could be more, scientists are notoriously conservative.  Plus the article makes no mention of positive feedback loops wrt Methane.

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