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NPR's Ari Shapiro talks with Ali Zaidi, President Biden's national climate advisor, about the first ever national standards on the amount of PFAS in drinking water.

After being hunted for decades, humpback whales returned to the Pacific Ocean in big numbers. Now, new technology is revealing that underwater heat waves are taking a toll on that recovery.

Kenya has endured months of record rainfall with no sign the deluge will stop any time soon. With over 200 killed in flash floods, many Kenyans think the government has been slow to react.

Decades ago, salmon in the Pescadero Creek along the California coast went extinct. Now conservationists, farmers and federal money for addressing human-caused climate change are helping them return.

Republican Gov. Phil Scott says the 'renewable energy standard' will increase electricity costs at a time when Vermont is becoming increasingly unaffordable.

A few years ago, a Philadelphia arborist named Max Paschall read an article about a man named John Hershey. Hershey ran a tree nursery and experimental farm in Pennsylvania in the 1930s.

Sydney, Australia, is suffering under a blanket of smoke and officials are sounding air quality alerts because of vast wildfires in the area. And it's still early in the fire season. Steve Inskeep talks to Stuart Cohen for the latest.

In Norway, where skiing is the top sport, huge crowds turned out there for the world championships of cross country skiing that wrapped up this weekend.

Some apple orchards across the state are reporting an unusually light apple crop this fall. Others say their late varieties are faring well.

Tucked away in a remote desert town, a hidden vault safeguards Chile's most precious natural treasures. From long-forgotten flowers to endangered crops.