Eric with Real World Green explains how to make your lawn more environmentally friendly. First, let your grass go dormant in the summer and don't water it as much. When you mow your lawn, consider using a push reel mower. A mower with a gas engine pollutes more than modern cars do. If you are going to use a gas engine mower, keep the blades sharp for a more efficient job. Use a mulching mower, because yard waste takes up a lot of space in landfills. Consider tearing up some of your lawn and putting in native plants instead. Native plants don't need nearly as much water as a traditional lawn requires.