ozone
Banned Ozone-Eating Emissions May Come From China
Has one of the "greatest environmental crime mysteries" in history been solved?
Ozone Thinning May Be More Harmful Than Ever
The ozone is depleting over the most populous areas of the planet.
NASA: Ozone Layer's Recovery Is Due to Chemical Ban
Chlorine levels specifically have been declining since at least 2005.
24,000 Deaths From Low Air Quality Could Be Prevented
The U.S. benefits from other countries working to curb greenhouse gases and improve air quality.
Ozone Hole At Its Smallest Since 1988
The hole was still two and half times the size of the U.S.