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 demonstrate proper judgment and maturity. Persons using a mower should wear heavy footwear, eye protection, and hearing protection in the case of engine-powered mowers. A 2001 study showed that some mowers produce the same amount of pollution (emissions other than carbon dioxide) in one hour as driving a 1992 model vehicle for . Another estimate puts the amount of pollution from a lawn mower at four times the amount from a car, per hour, although this report is no longer available. Beginning in 2011, the United States Environmental Protection Agency set standards for lawn equipment emissions and expects a reduction