Dirty Birds
Horned Larks collected in Illinois between 1904 and 1916 (left) and California and British Columbia between 1903 and 1922 (right) show the effects that coal soot had on bird feathers. Photo by: Carl Fuldner and Shane DuBay
Environmental, Science

Soot-covered Birds Provide Clues to 20th-century Pollution

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Dirty Birds
Horned Larks collected in Illinois between 1904 and 1916 (left) and California and British Columbia between 1903 and 1922 (right) show the effects that coal soot had on bird feathers.
Photo by: Carl Fuldner and Shane DuBay

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