ScienceDaily Posted October 9, 2017 Share Posted October 9, 2017 Birds in museum collections from Rust Belt cities around the turn of the century are covered with black soot from air pollution at the time. Scientists have compared the amount of soot on birds through the years to track envioronmental pollution over the last 135 years. Read the full article on ScienceDaily Link to comment Share on other sites More sharing options...
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