Clear, pure water is a product of a complex system and should not be wasted. Never simply run cold water down the drain, while waiting for it to turn hot. Save it for your house plants. Investigate the use of trickle irrigation for your garden. Improve our educational system.
Kids learn from more sources than just their teachers.
Give a child a plant, and teach him or her how to care for it. Or make a larger commitment, and sponsor a 4-H garden project or school garden program. Improve your community. Make your neighborhood more attractive by working with others. If you have no space, plant a geranium or zinnia in a window box.