Whatever happened to acid rain? - Joseph Goffman

Discover what causes acid rain, and how scientists were able to largely eliminate this major environmental threat.
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In 1963, scientists studying Hubbard Brook Experimental Forest made a shocking discovery. Their most recent rainfall samples were nearly 100 times more acidic than usual; which could destroy the area’s ecosystems in a matter of decades. What was causing this deadly rainfall? And what could be done to stop it? Joseph Goffman details how scientists transformed this major threat into a minor issue.
Lesson by Joseph Goffman, directed by Nick Hilditch.
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