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‘We are in a climate meltdown’: U.N. Secretary General calls for global action on climate
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Now Playing
‘We are in a climate meltdown’: U.N. Secretary General calls for global action on climate
04:43
UP NEXT
Record number of fires rage across South America
03:20
Why are killer whale attacks on the rise? Scientists set sail to find out
03:31
Florida wildlife authorities hold annual python challenge
03:47
How researchers in Puerto Rico are working to save coral reefs
03:52
4.7-magnitude earthquake felt in Malibu and along the Southern California coast
00:42