Charlie Riedel/AP
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The Real Climate Lesson
Charlie Riedel/AP
It’s too soon to tell whether climate change worsens tornadoes....
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Happy End of the World
Andrew Kelly/Reuters, via Corbis
A new book explores the history of mass extinctions and how the human species can survive the next...
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Big Idea: Our Global Cost
Mark Schiefelbein/AP
How do we measure and predict the human cost of climate change? By Andrew T. Guzman.
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cheat sheet
Carbon Dioxide Hits Record Mark
Highest in 3 million to 5 million years. MORE
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article
Climate Change Is Here
We need to stop debating and start accepting that climate change is happening.... MORE
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cheat sheet
Ships Will Soon Cross North Pole
As Arctic ice disappears. MORE
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article
Screwing Ourselves to Extinction?
A new poll finds that Americans believe the world’s population is growing too fast. Jerry Karnas reports. MORE
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article
The Age of Climate Change
While thousands rallied for climate change, the government was building a levee to protect the National Mall. Mark Hertsgaard on why we must adapt and avert. MORE
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article
Best Moments From Obama’s 2013 State of the Union Address
The president offered real talk on climate change and more in his fourth State of the Union address. MORE
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article
Cocktail-Party Cheat Sheet
Everything you need to know to sound like you know what you’re talking about this weekend. MORE
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article
Cocktail-Party Cheat Sheet
Here’s everything you need to sound like you know what you’re talking about this weekend. By Kevin Fallon. MORE
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gallery
World on Fire
Australia consumed by fires and droughts causing natural disasters in the U.S. See the ravages of global warming. MORE
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cheat sheet
EPA Chief to Step Down
Struggled to make climate-change priority. MORE
