About two billion years ago, the first oxygen-producing organisms initiated a similar process. Solar radiation then contributed to ozone formation, allowing life to diversify. This positive ...

This is due to the presence of colder temperatures, which facilitate the formation of polar ... atom can destroy up to ...

India's cities are already ranked among the world's most polluted, based on concentrations of fine particulate matter in the air. Now new research indicates they are battling rising levels of another ...

In densely populated coastal areas, reactions of polluted air with sea salt aerosol from the ocean can lead to high surface ozone levels that affect air quality. Chlorine has become infamous for ...