lunedì 20 giugno 2016

NYT Science: Remember the Ozone Layer?

Remember the Ozone Layer?
By C. CLAIBORNE RAY

It's still there, NASA tracks it, and scientists are still worried about it, though atmospheric levels of chemicals that damage it are slowly declining.

Published: June 21, 2016 at 06:00AM

via NYT Science http://ift.tt/28MnKTl