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.

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.

Restaurants are phasing out disposable wooden chopsticks.