After 17 years of trying to prop up their failing farm outside of London, Charlie Burrell and Isabella Tree were stressed, exhausted, and $1.7 million in debt. They decided to stop farming—no more plowing, planting, irrigating, chemicals. They gave away the farm—to nature. 

20 years later, their land has one of the most important biodiversity hotspots in the UK. These 3500 acres teem with species, many of which are endangered or hadn’t been seen in the UK for centuries. And the twist: Their land now generates more money than it ever did as a farm.

Similar rewilding experiments are under way in 30 countries. They offer protection for nearby farms, corridors of safety for animals—and buffers against climate disasters for us.

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