Earth Helpers: Kids Taking Action to Save Our Planet | Joyce Lee | TEDxWISS Youth

Hi guys, I'm Joyce and I'm going to talk about pollution. So first I start with two questions. What is pollution and why is it so important.Let's zoom in. First, pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants.There are five types of pollution most people know. is land pollution, ocean pollution, air pollution, light and noise pollution. Land pollution happens because of littering or cutting down trees.Ocean pollution happens when we thr ...