Crash Course
Crash Course Kids 38.1: Big Changes in the Big Apple
Find out how humans have been changing our environments for a long time. [4:56]
American Geosciences Institute
American Geosciences Institute: Big Idea 8: Natural Hazards Affect Humans
Watch how natural hazards occur, how they affect our lives and what we can do to prepare for and mitigate their effects. [4:27]