A new global map shows trouble spots for air pollution containing tiny particles called at PM2.5 that can make their way deep into your respiratory system.

In South Asia, days with both extreme heat and extreme pollution are expected to increase 175% by 2050. Separately, the health effects are bad; together they will likely be worse.

Citizen scientists have helped researchers track the changing environment during the pandemic.

Small-scale gold mining operations in developing countries are major sources of toxic mercury pollution, using techniques that haven't changed much since the California Gold Rush 150 years ago.

Yes, poor air quality is bad for your health – but beware simplistic correlations with COVID-19.

As lockdowns ease off, there is a danger that the old city traffic jams will soon be back with a vengeance.

From Nairobi to Los Angeles, pandemic lockdowns have cleared pollution from the skies. But those blue vistas may be temporary, and shutdowns aren't slowing climate change.

After a 5-year review, the EPA is leaving US standards for fine particle air pollution unchanged, even though recent studies suggest that tightening them could save thousands of lives yearly.

Simultaneous air pollution and extreme heat events will "increase in frequency by 175% by 2050" in Southeast Asia, a report finds.

"It's as if I magically implemented our most ambitious emissions reduction policies," says Lucy Hutyra, on cleaner air following COVID-19 directives.