Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Jan 14, 2013
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.