Bernie Sanders' answer is more straightforward.
Diverting more water from the lake could pose serious health and economic threats.
A startling look at the dangers facing environmentalists around the world.
Not surprisingly, Nordic countries dominate the top five.
Norwegians intend to save their climate and their figures with cross-country bike lanes.
The move could signal a change in the way the agency approaches conditional registrations.
According to a new study, the prospect of near-term sustainable aviation is a myth.
Spoiler alert: There are no questions on hand size.
One candidate did take a moment to defend the embroiled Michigan governor.