This summer brought a number of new heat records -- most worryingly, the hottest oceans on record.
Here's a tree even non-hippies would love to hug -- and he kicks ass, too.
This indie thriller highlights some of the most detestable clichés of the save-the-trees mentality. Our roundtable of writers weigh in.
“This is no cause for alarm,” one official said. Um, yes, it is.
A new study finds that around the globe, sun-wary swimmers slough off more than 13 million pounds of sunscreen each year. That's bad news for fish.
Solar power and battery capacity will drive old-fashioned utilities in Europe to extinction, starting in 2020, according to a new report.
Want to sell carrots and celery to kids? Try dressing them up like junk food and shooting them out of a machine gun.
Ecolabels from certification programs like the Marine Stewardship Council align market interests with sustainability initiatives -- but can you trust what’s on the label?
More infrastructure for cyclists means fewer cars on the road, as well as less pollution, congestion, sedentary-lifestyle health problems, and traffic fatalities.