BBC News |
'Sooty birds' reveal hidden US air pollution
BBC News Soot trapped in the feathers of songbirds over the past 100 years is causing scientists to revise their records of air pollution. US researchers measured the black carbon found on 1,300 larks, woodpeckers and sparrows over the past century. They've ... Dirty Birds Are Refining Climate Models Dirty old birds shed light on key global warming particle Dirty birds show just how catastrophic air pollution used to be |
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