Earth Day and The Environment – 15 Graphic Organizers. This resource is a great resource for any time of the year but particularly useful to observe Earth Day on April 22nd.The fifteen organizers each have three components: a definition section, a topic section, and a Website Search activity. The organizer topics are: Acid Rain, Biodegradable, Biodiversity, Conservation, Deforestation, Earth Day, Ecology, Endangered Species, Environment, Environmentalists, Global Warning, Greenhouse Effect, Re