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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View full lesson: https://ed.ted.com/lessons/should-you-be-worried-about-acid-rain-joseph-goffman
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Animator's website: http://nickhilditch.com
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