Global warming may be speeding up evaporation in tropical seas, sucking out water and making equatorial oceans saltier and polar seas less salty, according to research published recently in the journal Nature.
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More than one-third of U.S. fish and wildlife species are at risk of extinction in the coming decades. We're on the ground in seven regions across the country, collaborating with 52 state and territory affiliates to reverse the crisis and ensure wildlife thrive.