Chris Hayes talks with the Costa Rican ambassador to the U.S., Román Macaya, about how Costa Rica was able to go months without burning fossil fuels.March 24, 2015
UP NEXT
'We're in a place to win the battle': Kerry sounds hopeful note on climate (with a big 'if')
08:51
Follow the money: Fracking billionaires funding anti-renewable energy propaganda cartoons
04:41
Big Oil’s Decades-Long Gaslighting Campaign
06:38
World records its hottest days ever this week
03:24
As Texans suffer in the heat, state Republicans play politics
11:05
'Gimme a break!': Sen. Kaine vows to strip pipeline from debt ceiling deal