Climate change caused the Russian heat wave, according to statistics and science (if you believe that sort of thing).

Nebraska could reroute the Keystone XL pipeline.

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Eugene Robinson smacks down climate deniers. Money quote: "It is the know-nothing politicians — not scientists — who are committing an unforgivable fraud."

This German transportation system is a car share, bike share, and public transportation ticket all in one. The more you bike, the less you pay.

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Restaurants are phasing out disposable wooden chopsticks.