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2018 was the fourth hottest year on record.

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Earth has been warming up for decades.

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The last five years are the hottest five years on record…

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And the last four were all more than 1 degree Celsius

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warmer than the 19th Century average.

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A warmer climate contributes to…

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melting polar ice and mountain glaciers,

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rising sea levels,

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more severe droughts,

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longer fire seasons.

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NASA and NOAA work together to study the temperature from weather stations,

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ships and buoys in the ocean, and Antarctic research stations.

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[NASA]