04:39
Rise and Fall: Population, Urbanization and the Environment
Much of the change that has occurred in many cities over the past century has come about as a result of the interplay among three factors: population shifts, the environment, and urbanization.
04:02
Due West: Aliso Creek
Aliso Creek, located in Orange County, California, has a consistent beach pollution problem due to rapid development of the upstream environment. As the watershed has been largely paved over, the water is prevented from soaking in and filtering natu...