Podcast:Who Smarted? - Educational Podcast for Kids Published On: Fri Nov 18 2022 Description: What causes Pollution? What is the worst type of Pollution? What can you do to help reduce Pollution? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.