.@Harvard 's David Keith Knows How to Dial Down the Earth’s Thermostat. Is It Time to Try? http://ow.ly/IuMBX via @Recode @jtemple
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.@Harvard 's David Keith Knows How to Dial Down the Earth’s Thermostat. Is It Time to Try? http://ow.ly/IuMBX via @Recode @jtemple