NPR's Mary Louise Kelly speaks with Glenn Kessler, outgoing writer of the Washington Post's Fact Checker, about recent buyouts at the paper, and the current state of fact-checking.

A new study finds a strong relationship between exposure to air pollution and the risk of developing dementia, while air quality regulations are being weakened in the U.S.

Brazilian industries given a reprieve from Trump's tariffs are sighing relief while others are still hoping a deal can be worked out.

For years, researchers have been trying to shut down a mosquito's ability to transmit certain diseases. Brazil is making a massive investment in the effort, aimed at throttling dengue levels.