There is substantial evidence that CO can adversely affect health, participate in atmospheric chemical reactions that result in formation of ozone air pollution, and contribute to climate change. EPA focus on carbon monoxide?Īir quality regulators are concerned about air pollutants which may reasonably be anticipated to endanger public health and welfare. There are also a number of indoor sources of CO that contribute to total exposure. ![]() Carbon monoxide can also be formed through photochemical reactions in the atmosphere from methane and non-methane hydrocarbons, other volatile organic hydrocarbons in the atmosphere, and organic molecules in surface waters and soils. Nationally and, particularly in urban areas, the majority of outdoor CO emissions to ambient air come from mobile sources. It results from the incomplete combustion of carbon-containing fuels such as natural gas, gasoline, or wood, and is emitted by a wide variety of combustion sources, including motor vehicles, power plants, wildfires, and incinerators. ![]() Carbon monoxide (CO) is a colorless, odorless gas.
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