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Nearly Half of US Breathes Unhealthy Levels of Pollution—Cars and Trucks Largely to Blame

Union of Concerned Scientists

referred to as secondary emissions – is formed in the atmosphere from precursor pollutants that also originate from the combustion in fossil-fuel powered engines, such as nitrogen oxides (NO x ), sulfur dioxide (SO 2 ) and volatile organic compounds (VOCs). But beyond this primary formation of PM 2.5 , even more PM 2.5

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American Lung Association Report Details Health And Environmental Impacts Of Fuel-Burning Appliances At Home

PA Environment Daily

"After a comprehensive literature review, our research found that the household use of methane gas, wood, propane and heating oil impacts indoor air quality, health, and drives climate change through the emission of compounds such as carbon monoxide, nitrogen oxides, particulate matter, formaldehyde and others."