A reader wonders which lube he should use in his new car. Umbra has answers in a jiffy.
George Carter, 15, helped transform the New Orleans school lunch culture into a healthier environment before he was murdered.
Watch some of the ads that hit Republican candidates for being beholden to wealthy polluters.
The mayor of South Miami is fed up with Florida's refusal to address sea-level rise, which threatens to wipe out the southern end of the state.
It's a spot of good news in an otherwise gloomy news-scape.
Look who's calling attention to ocean plastics now -- the Divine Miss M herself!
California's neverending drought spares no plant, animal, or holiday tradition. Its latest victim: pumpkins.
Some food activists are not happy with the Gates Foundation's programs to help farmers. But why? We boil the issue down in a new video.
The premise of the case: The sky belongs to everyone, so governments must protect it.
We've devised the world's shortest survey to find out what kind of actions our readers are taking. You know you want to.