Tuesday is Earth Day, which means it's a good time to go green and help save our planet.
With concerns over climate change right now, there's a growing need to increase public awareness of environmental problems.
Earth Day was founded on April 22, 1970, after U.S. Sen. Gaylord Nelson from Wisconsin wanted to respond to an oil spill off the Santa Barbara coast.
Since then, Earth Day has been observed by millions as a day to help the planet by keeping our land clean and air quality fresh.
People around the world are encouraged to post a "selfie" with their local environment as a backdrop.
You can post your photo to Twitter, Instagram or Google-Plus using the hash tag #globalselfie.
Photos will be used to create a mosaic image of Earth. Details on how to participate >>