Climate negotiators eye the 'forgotten 50%' of greenhouse gases.

While the U.S. has focused on CO2 emissions, some nations are pushing for measures to curb black carbon, HFCs and methane, which they say will be easier to achieve and will show quick results.

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Turn Off The Lights

If everyone at Boston University turned off one light, for one hour a day, for one year, we could save 733,475 kWh per year, the equivalent of removing 97 cars (or 1,161,000 pounds of CO2) from the road for an entire year.

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