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Anthropologist James Suzman has lived with one of the last groups of hunter-gatherers. And it's made him rethink his perspective on the Western lifestyle.

When a drifting weedkiller hit America's farming heartland this summer, it damaged crops and friendships. The chemical could also be bad news for other vegetation, as well as bees and butterflies.

Earlier this month, thousands of Atlantic salmon escaped a net pen in Washington state, raising concerns from environmentalists and questions about farming non-native species. Here are some answers.

In Shanxi Province, coal is big business and a source of identity. Now China is closing and consolidating its coal mines under state ownership, and the region has not figured out how to rebound.

As a freezing winter drives many of us indoors, some extreme athletes embrace the cold as a great way to burn calories and retrain the immune system while working out. Not so fast, physiologists say.

PFAS are a family of chemicals accumulating in the soil, rivers, drinking water and the human body. How much exposure to these substances in clothes, firefighting foam and food wrap is too much?

After years of budget and political pressure, some climate scientists are changing the way they describe their research, and avoiding the term "climate change."

Plastic trash less than 5 millimeters long is in the things we eat and drink, and the air we breathe. Scientists are just beginning to study where it comes from and how it might affect our health.

Bruce Cannon Gibney writes that for decades the U.S. has been run by people who are deceitful, selfish, imprudent, remorseless and hostile.

The Department of Defense has increased protections for military personnel from exposure to lead from firearms. It can be a health problem for people using recreational shooting ranges, too.