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In 2018, Delta airlines unveiled new uniforms made of a synthetic-blend fabric. Soon after, flight attendants began to get sick. Alden Wicker explains how toxic chemicals get in clothes in To Dye For.

In honor of NPR's 50th birthday, we asked listeners who have reached that milestone for some life advice. Hundreds answered, including Karl Colón.

From lemons to ham, salt is a handy food preservative. But researchers studying some really old salt crystals found them preserving something else — evidence of life.

This is a key part of Canada's effort to boost oil exports to Asian markets — but the plan has been protested by indigenous groups and environmental activists.

Twenty-five "healthy young persons" were exposed to different concentrations of nitrogen dioxide for hours as part of a study for the car manufacturers. The gas can cause respiratory problems.

Coral in an area in the Atlantic Ocean stretching from Connecticut to Virginia has been protected from deep-sea commercial fishing gear, by a new rule issued this week.

Huge windmills -- promoted as a source of clean, renewable power -- are sprouting up on mountaintops in the Appalachian states. But some local opponents say the tall turbines blight the rural landscape.

A wide range of Latino communities in the United States are affected by climate-driven storms, floods, droughts and heat waves, and are leading the charge to address global warming.

The rules would lower emissions of mercury and other toxic pollutants that can harm brain development of young children and contribute to heart attacks and other health problems in adults.

Despite a daily cleanup that leaves the post-parade landscape remarkably clean, uncaught beads dangle from tree limbs like Spanish moss and get ground into the mud under the feet of passers-by.