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  • 2013-01-14T22:00:00Z on YouTube
  • 13m
  • United States
  • English
  • Documentary
Hank talks about the last major way humans are impacting the environment in this penultimate episode of Crash Course Ecology. Pollution takes many forms - from the simplest piece of litter to the more complex endocrine distruptors - and ultimately, humans are responsible for it all.
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