Thousands of chemical compounds in wildfire smoke are interacting with each other and sunlight as the smoke travels. For people downwind, it can become more toxic over time.

A new study shows how toxic chemicals like benzene are leaching into water systems after nearby fires. The pipes don't have to burn – they just have to heat up.

Living near oil and gas production can affect mental health, driving stress and feelings of depression.

Living near oil and gas production can affect mental health, driving stress and feelings of depression.

PFAS chemicals are toxic, widespread and persistent in the environment, and the federal government has been slow to regulate them. A scientist explains why evaluating them one by one isn't working.

Endocrine-disrupting compounds are pervasive in modern life, from food packaging to shampoo. Research is connecting their effects on humans to risk of severe illness or death from the coronavirus.

A new study shows that while fine particle air pollution has declined nationwide over the past 40 years, the health and environmental benefits haven't been shared evenly.

Flaring, or burning, waste gas from energy production has sharply increased over the past decade. It wastes usable fuel, pollutes the air, and helps drive climate change.

A new study finds an association between living near active oil and gas wells in California and low birth-weight infants, adding to findings elsewhere on health risks from oil and gas production.

Many Native American tribes are reporting high COVID-19 infection rates. State and federal agencies are impeding tribes' efforts to handle the pandemic themselves.