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Erin Ross Feb 21
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Pigeons may be proxies for pollution in people

Pigeons, surrounded by snow, cluster on dry ground around a New York City storm drain to stay warm
Pigeons of New York. Photo: Cem Ozdel / Anadolu Agency / Getty Images

Pigeons and people living in the same neighborhood are likely to have comparable rates of lead exposure, according to a study presented at the 2018 meeting of the American Association for the Advancement of Sciences in Austin, Texas.

Why it matters: The birds might one day serve as the metaphorical canary in a coal mine, alerting officials to pollution-caused illnesses before they occur in humans.