Happy Earth Day! Love Your Mother! Earth Day was founded in 1970 in response to growing concern about the environment, and is celebrated throughout the world on April 22. It was originally envisioned as a day-long environmental "Teach-in" for activists, and is often credited with creating momentum which helped to pass the Clean Water Act, the Clean Air Act and the Endangered Species Act. So help your friends get into the environmental spirit with these clever globes, glitter graphics and other Earth Day comments. These comments are perfect for posting on any social networking site or blog.