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Our Forests Are on Track to Hit a Crucial Climate Tipping Point by 2050, Scientists Warn MARLOWE HOOD, AFP 15 JANUARY 2021 Forests and other land ecosystems today absorb 30 percent of humanity s CO2 pollution, but rapid global warming could transform these natural sinks into carbon sources within a few decades, opening another daunting front in the fight against climate change, alarmed researchers have said.
Climate skeptics often describe CO2 as plant food , suggesting that increased greenhouse gas emissions will be offset by a massive upsurge in plant growth. But the new study shows that beyond a certain temperature threshold - which varies according to region and species - the capacity of plants to absorb CO2 declines. ....