Gallery Section
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Tornadoes by State

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Tornadoes by State

The average number of tornadoes in each state between 2005 and 2014.

More CO2 = More Pollen

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More CO2 = More Pollen

If CO2 emissions continue at the current pace, pollen counts are projected to nearly double by 2060.

Record Highs Beating Record Lows

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Record Highs Beating Record Lows

Record lows are outpacing record highs since last year. This is becoming rarer in a warming world.

Poison Ivy in a Warming World

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Poison Ivy in a Warming World

Scientists say increased CO2 emissions are making poison ivy worse.

A Seasonal & Regional Tornado Breakdown

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A Seasonal & Regional Tornado Breakdown

The probability of a tornado touchdown somewhere in the U.S. jumps to nearly 80 percent in May and nearly 90 percent in June.

Forecast Temperature Changes by 2100

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Forecast Temperature Changes by 2100

A look at how U.S. temperatures are projected to change, according to the Third National Climate Assessment released May 6, 2014.

Rising Global Temperatures and CO2

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Rising Global Temperatures and CO2

The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures.

CO2 Hits Climate Milestone

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CO2 Hits Climate Milestone

April 2014 was the first month in human history with average CO2 levels above 400 ppm.