The Delaware River, a major source of drinking water for Philadelphia, is facing an emerging threat as rising seas push saltwater farther upstream. It's a problem that other places, too.
A typical drought is a slow-motion catastrophe. But scientists are trying to figure out a phenomenon called a flash drought, which forms in as little as two weeks.
With over 8,000 different "sustainable" hotel certifications, how do you know what's greenwashing and what's the real deal? We consulted experts to find out.
Four of the fellows who participated in the program this year will discuss their ongoing research, activism, and experiences with publishing their ideas in the public sphere.
With job loss and stifled development in the renewable energy sector, economists, politicians, and advocates say policy action is necessary to stay on track.
