Natural gas tens of millions of structures that use the fuel, the individual risk of using natural gas is very low. Natural gas heating systems may cause carbon monoxide poisoning if unvented or poorly vented. In 2011, natural gas furnaces, space heaters, water heaters and stoves were blamed for 11 carbon monoxide deaths in the US. Another 22 deaths were attributed to appliances running on liquified petroleum gas, and 17 deaths on gas of unspecified type. Improvements in natural gas furnace designs have greatly reduced CO poisoning concerns. Detectors are also available that warn of carbon monoxide and/or explosive gas (methane, propane,
Natural gas in Canada Natural gas in Canada At per day in 2011, Canada was the fourth-largest producer of natural gas in the world. Its proven reserves were at the close of 2006. A large portion of Canada's gas is exported to the United States; in 2006, per day. In 2016 natural gas was used to provide 35% of all energy in Canada, double the amount supplied by electricity. Electricity generated by natural gas was 8.5% of the nations total. Natural gas is used to supply 50% of space heating, and 65% of water heating in homes, similarly 80% of businesses use natural gas