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CNN

"Climate change is the biggest threat to security"

Duration: 03:55
"Climate change is the biggest threat to security" and "those with the least security are now certain to suffer," Naturalist David Attenborough said to the UN Security Council on Tuesday. Meteorologist Pedram Javaheri breaks down the state of our planet.

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"Climate change is the biggest threat to security"

"Climate change is the biggest threat to security"

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