Earth Day was this past Sunday, April 22nd, but we shouldn't just do things to help our planet one day out of the year.
Google Earth Day is a great site that has some great resources to help anyone celebrate Earth Day, Everyday.
The site has information on starting your own garden, finding discount seeds, connecting with other gardeners, gardening tips, recipes, helping find a community garden, and much more.
http://www.google.com/campaigns/plantforearthday/
Related:
Earth Day Resources for Educators
Google Resources for Education - tips, resources, links, help, how-to's, apps, lesson ideas, and more.