Gas lighting explains why a large number of older gas lamps have been converted to electricity. Solar-rechargeable battery-powered gas light controllers can be easily retrofitted into existing gas lamps to keep the lights off during daylight hours and cut energy consumption and green-house gas carbon emissions by 50%. The use of natural gas (methane) for "indoor" lighting is nearly extinct. Besides producing a lot of heat, the combustion of methane tends to release significant amounts of carbon monoxide, a colorless and odorless gas which is more readily absorbed by the blood than oxygen, and can be deadly. Historically, the use of lamps
Lawn mower are still available. The reel is attached to the mower's wheels by gears, so that when the mower is pushed forward, the reel spins several times faster than the plastic or rubber-tired wheels turn. These types of reel mowers offer the benefit of zero pollution being produced. Since all of the energy necessary comes from the user, however, this method of mowing is the most strenuous and is not recommended for large lawns. Depending on the placement of the reel, these mowers often cannot cut grass very close to lawn obstacles, like trees, driveways, edging, etc., and also require a