On his new hybrid car, being a member of Mensa, and the most environmentally conscious character on "Modern Family."
Denmark supplies three out of four of the world's offshore wind turbines, and it's on track to be free of fossil fuels by 2050.
Oil-giant BP wants us to think the Gulf of Mexico is doing just fine. Too bad we’re so willing to go along.
Find out if you're spending too much money on hot showers.
Time-lapse photography reveals corals as vicious predators, Bay Area fog as a rapid river, and so much more.
Caffeine won't be the only reason you love coffee. Arthur Kay and his team at Bio Bean have developed the technology to convert coffee grounds into a uniquely sustainable, clean source of renewable energy.
Citizen scientists forgo the slopes to search for scat.