Advertisement
YOU ARE HERE: LAT HomeCollections

Science Briefing

Laughing gas now top ozone threat

August 29, 2009|From Times Staff And Wire Reports

Nitrous oxide, known as laughing gas, is the biggest man-made destroyer of Earth's ozone layer now that the use of chlorofluorocarbons and other ozone-depleting gases has been restricted globally.

Produced by fertilizing farmland and used by dentists to calm patients, nitrous oxide makes up about 40% of the emissions of ozone-depleting gases, said A.R. Ravishankara, a coauthor of a study in the journal Science.

Advertisement
Los Angeles Times Articles
|
|
|