RFK Jr. faced backlash after swimming with his grandkids in Rock Creek, a waterway known for high bacteria levels and sewage runoff.
Read moreLos Angeles remains the smoggiest city in the U.S., while air pollution affects nearly half of the population, exacerbated by climate change and policy changes.
Read moreCountries reach a historic accord on pandemic preparedness, aiming to prevent future health crises like COVID-19.
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