There was a record-breaking increase in methane in Earth’s atmosphere last year

Concentrations of a super potent greenhouse gas in the atmosphere — methane — grew tremendously in 2021. It’s still something of a mystery why the world saw such an “exceptional increase” last year, says the World Meteorological Organization (WMO), which released the numbers yesterday.

The reasons for the big leap last year are unclear because methane in the atmosphere can come from…

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