Hyperloop Transportation Technologies plans to break ground on a test track next year.
Costa Rica has set an ambitious goal for itself: To be entirely carbon-neutral by 2021. But it’s really not that crazy.
Two Utah state lawmakers speculate that the EPA might have deliberately dumped mine waste into the Animas River.
The real problems with a controversial, retracted study weren't about the science but about respect for the subjects' values.
And you can blame up to 25 percent of the drought on climate change.
Coal-mining and oil-drilling programs on federal land are big money-wasters, in addition to polluting the environment and hurting the climate.
Irrigation water appears to be a major loophole in the USDA's organic food safety program.
A reader wants to know how his college's customary balloon swarm affects the environment. Umbra offers a crash course.
Kramer Wimberley knows what it's like to feel unwelcome in the water. As a dive instructor and ocean-lover, he tries to make sure no one else does.