Geoscientist Raymond Pierrehumbert argues that carbon dioxide is always worse than shorter-lived pollutants like methane.
Even if we slash greenhouse gases immediately, the dangerous effects of global warming will continue for centuries to come.
A $1 billion lawsuit accuses the Japanese nuclear energy company Tepco of lying about radiation levels.
Inside the world’s biggest wastewater recycling facility.
The islands face a forecast that is being called “unprecedented.”