Dangerous climate change will not be prevented by reduced emissions. The damage is already done. For many vulnerable societies, the priority must be adaptation.
About 15 million years ago, dense African forests began drying up to be replaced by open savannah. Tree-dwelling primates eventually descended and found that the new environment suited walking.
Humanity has been adapting more or less successfully to climate changes ever since. After the last ice age ended between 10,000 and 12,000 years ago, agriculture and urban settlements developed and humans gradually colonized all but the most hostile environments. But our transformation of the environment is now coming back to haunt us. Man-made climate change is rapidly increasing temperatures and sea levels, altering rainfall patterns, and producing more violent storms.
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