Consider replacing them with newer models as emissions devices are refined, or even with much older devices such as push mowers and hand saws. Be especially mindful if you live in or near an urban area to time your activities, like mowing the lawn, to occur outside the sunniest parts of the day. Even refueling these items, stripping paint and cleaning with solvents should be reduced or postponed until the hottest and sunniest parts of the day are over. Purchase products that are durable, reusable, or use less packaging. These efforts will reduce the pollutants that reach the air during the manufacturing and disposal processes.
Trees use carbon dioxide, replenish oxygen and hold soil in place.
Plant rows of evergreen trees between the house and the direction of prevailing winter winds to shield the house from winter gusts. Avoid home insulation containing CFC and use fans instead of air conditioners. If you do use air conditioners, have them pressure checked for leaks. Take unwanted refrigerators or air conditioners to a coolant recycling facility before disposing of them. Substitute pump sprays for aerosol cans whenever possible.