Last week, much of the Midwest and eastern US experienced hazy skies and red sunsets. The cause was smoke transported from the Western US by the jet stream and spread as far as Boston and even Europe.

Wildfires blanketing several Western cities are creating hazardous health conditions. Don't count on cloth masks to protect your lungs.

Wildfires blanketing several Western cities are creating hazardous health conditions. Don't count on cloth masks to protect your lungs.

A study shows that low-income communities and communities of color are bearing the brunt of the energy industry's pollution in the region. The risks also extend to the unborn.

Within the growing mountains of electronic waste, precious metals lie waiting to be recovered.

New treatment can break down toxic substances into relatively harmless elements.

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.

Neighborhood characteristics like pollution from busy roads, widespread public transit use and lack of community-based health care are putting certain communities at greater risk from COVID-19.