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Earth & Environment

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air pollution

BAD AIR  U.S. pollution levels have come way down since the 1970s, but there’s still enough smog to raise the risk for cardiovascular deaths. Researchers are also drawing new connections between dirty air and metabolic and brain disorders.

Harding Icefield in Alaska

SNOW DECORATION  Algae turn the snow pink and red on parts of Alaska’s Harding Icefield. New research finds that the pink snow melts faster than clean snow.

chicken farm

COOPED UP  Thanks in large part to antibiotics, chicken production has become heavily industrialized, as detailed in a new book.

Earth & Environment

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