Looks like coal power in Scotland is becoming almost as elusive as Nessie.
Republican Sen. Lindsey Graham is stuck between a rock and a hard place.
There’s a whole lot that's wrong with the caucus system.
There's a limit to the growth of solar, but we're not even close to reaching it.
New high-tech fabrics can clean themselves -- just add sun.
Three unrelated industries have a lot more shared history than we thought.
Will Donald Trump lash out at Leo next?
A new U.N. report offers insight into countries' differing approaches to the clean energy sector.
A new study shows just how much CO2 -- and lives -- we'd save if we just cut our meat consumption in half by 2050.