A promising new study suggests that Earth's ozone layer could be back on track to a full recovery after four years of worryingly large ozone holes.

Photochemical smog affects the properties of aerosol particles. For example, transformation of soot can alter water uptake and cloud formation. To better understand the atmospheric chemistry within ...

With the global shift towards sustainable and renewable energy, the urgency to develop efficient methods for producing clean ...

A chemist named Arie “Haagy” Haagen-Smit noticed that the smog in Southern California had a “bleach-like” odor that reminded him of a chemistry lab. In previous research, he used an apparatus to ...

Who were the victims? What happened to the survivors? Did the smog sentence them to early graves? Spoiler alert: not everything is as clear — or deadly — as it might seem. Concerns about breathing ...

Every year for the past decade, a blanket of smog has enveloped Delhi when winter approaches, turning day into night and disrupting the lives of millions of people. Some of them, particularly ...

New Delhi recently saw air pollution levels at 30-35 times the safe limit (Credit: Getty Images) As New Delhi makes headlines yet again for its choking smog, experts and holidaymakers alike are ...

Smog is a mix of smoke and fog, and there are two main types: Photochemical smog and Sulfurous smog. Photochemical smog is the most common. Photochemical smog, often referred to as 'Los Angeles ...

Satellite images from Monday, showed a thick smog covering several South Asian cities, including the Indian capital New Delhi and the Pakistani cities of Lahore and Karachi. The region’s blanket ...

Lahore comes alive at night. But this year’s record onslaught of cold-weather smog — residents call it the “fifth season” — has broken its rhythms. By Zia ur-Rehman Photographs by Betsy ...