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Can this country go ‘carbon-neutral’ by 2021?
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.
Energy on msnbc
This Is Big!00:00
Tea partier calls for ‘energy revolution’00:40
Is clean coal worth the costs?00:00
Train explosion, crash demonstrate dangers04:14
The 'dark lord of coal country' speaks06:25
Climate advocates feel a moment in history02:45