Hank gives the run down on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides. Like Crash Course? www.facebook.com/YouTubeCrashCourse Follow Crash Course! www.twitter.com/TheCrashCourse T*mbl Crash Course: thecrashcourse.tumblr.com Table of Contents Ecosystem Services 00:51 The Importance of Biodiversity 04:07 Deforestation 06:42 Desertification 06:49 Global Warming 07:59 Invasive Species 08:51 Overharvesting 09:20 Crash Course/SciShow videos referenced in this episode: Hydrologic and Carbon Cycles: www.youtube.com/watch?v=2D7hZpIYlCA Nitrogen and Phosphorus Cycles: www.youtube.com/watch?v=leHy-Y_8nRs Ecological Succession: www.youtube.com/watch?v=jZKIHe2LDP8 Climate Change: www.youtube.com/watch?v=M2Jxs7lR8ZI Invasive Species: www.youtube.com/watch?v=eDOwTXobJ3k Food Shortage: www.youtube.com/watch?v=bPLJP84xL9A References and image licenses for this episode can be found in the Google document here: dft.ba/-3n5P Support CrashCourse on Subbable: subbable.com/crashcourse

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