Did you know that all living things change their environments? It's true. Beavers, deer, worms, and humans all change their environments. It just so happens that humans change our environments in big, obvious ways. In this episode, Sabrina chats about how humans have been changing our environments for a long time! Watch More Crash Course Kids: https://www.youtube.com/user/crashcoursekids ///Standards Used in This Video/// 5-ESS2-2. Describe and graph the amounts and percentages of water and fresh water in various reservoirs to provide evidence about the distribution of water on Earth. [Assessment Boundary: Assessment is limited to oceans, lakes, rivers, glaciers, ground water, and polar ice caps, and does not include the atmosphere.] Want to find Crash Course elsewhere on the internet? Crash Course Main Channel: https://www.youtube.com/crashcourse Facebook - https://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/thecrashcourse Tumblr - http://thecrashcourse.tum