Washing the car typically uses many gallons of water and sends toxic runoff into storm drains and, ultimately, lakes and streams. Products such as Lucky Earth Waterless Car Wash not only save water, they get cars shiny again with no runoff. A no-rinse product from Eco Car Care requires only a couple of gallons of water, to dilute the cleanser. And though Simple Green’s car wash solution requires a full rinse, the sudsy runoff won’t harm lawns or other greenery.