Click on any of the links below to play some games about saving the Earth!
http://www.primarygames.com/holidays/earth_day/games/planitgreen/
http://www.primarygames.com/holidays/earth_day/games/recycle/
https://www.starfall.com/h/holiday/earthday/?t=256804006
http://www.primarygames.com/holidays/earth_day/games/landfillbill/
http://www.sheppardsoftware.com/usa_game/holiday_wordgames/earthday_wordsearch.htm
http://images.nationalgeographic.com/wpf/media-content/richmedia/1/1143/project/dist/desktop.html