Gases: These include nitrogen dioxide (NO₂) and ground-level ozone. “These are potent oxidisers,” says Dr Mahto. “When they ...

Pollution is a public health concern, and is considered to be any harmful material introduced to the environment. Many materials can cause such harm and are referred to as pollutants. Pollutants are ...

Air pollution is expensive. It causes disease, which results in health care costs. It causes people to miss work because they are sick, disabled, or need to care for an afflicted family member. And it ...

In 2017, biogeochemist Janice Brahney was collecting dust deposited in remote wilderness areas in the western US. She wanted to study how phosphorus that was transported through the air to these wild ...

On a December day in Lahore, Pakistan's second-biggest city, the smog concealed tall buildings. Men on motorbikes seemed to push through it as they rode. It reeked of diesel and charcoal, compelling ...

Particle-based ambient air pollution causes more than 4 million premature deaths each year globally, according to the World Health Organization. The tiniest particles—2.5 microns or smaller, known as ...

ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. Leer en español. From the urban sprawl of Houston to the ...

We visualized the damaging, tiny particles that wreak havoc on human health. From the Bay Area to New Delhi, see how the world’s worst pollution compares with your local air. The floating particles on ...

State regulators rejected one of three mines that a company planning a northern Wisconsin zinc and copper mine submitted as examples of similar mines that have operated pollution free, authorities ...