Lawrence Berkeley National Laboratory

Air conditioners being loaded onto a truck for delivery. Most of the world's AC units cool air with chemicals that are big contributors to global warming. A new agreement forged in Kigali, Rwanda, will phase those coolants out over then next 30 years.

Keeping our planet cooler just got a little easier

Environment

Negotiators have agreed to a global phase-out of chemicals that run some air conditioners and refrigerators, but are also big contributors to global warming. That has countries and researchers scrambling to come up with clean and affordable alternatives.

Obama’s rock star science team

Environment
The World

Adam G. Riess on his Nobel Prize

Environment