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and no challenge

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no challenge

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poses a greater threat to future

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2014 was the planet's warmest year on

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now one year doesn't make a trend

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but this does

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14 of the 15 warmest years on record

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have all fallen in the first 15 years of

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i've heard some folks try to dodge the

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evidence by saying they're not

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scientists

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that we don't have enough information to

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act

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well

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i'm not a scientist either

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but you know what

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i know a lot of really good scientists

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at nasa and at noaa and at our major

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universities and the best scientists in

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the world are all telling us that our

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activities are changing the climate

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and if we don't act forcefully

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we'll continue to see rising oceans

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longer hotter heat waves

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dangerous droughts and floods

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and massive disruptions that can trigger

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greater migration and conflict and

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hunger around the globe

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the pentagon says that climate change

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poses immediate risks to our national

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security we should act like it

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that's why over the past six years

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we've done more than ever to