Political scientist Brendan Nyhan explains why fact-checking keeps candidates honest…sometimes.
A trove of secret documents details the US government’s global push for shale gas.
Gulf coast ecosystems were supposed to rebound after the BP oil spill. They haven’t.
We’re 20 years away from catastrophe, says PricewaterhouseCoopers.
Geoscientist Raymond Pierrehumbert argues that carbon dioxide is always worse than shorter-lived pollutants like methane.