4 days ago
Earth's climate is approaching irreversible tipping points
Science & technology | Points of no return Photograph: Photo by Lucy Waghorn/Copyright
T HE AMAZON rainforest is so big that it makes its own climate. As they photosynthesise and transpire, its billions of trees collectively produce enough moisture to form clouds. These, by some estimates, are responsible for at least a third of the rainforest's life-sustaining rainfall. But climate change is disrupting this circular process. The build-up of greenhouse gases in the atmosphere has raised regional temperatures, worsened droughts and increased the risk of fires. All kill trees.
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