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In atmospheric chemistry, NO x is shorthand for nitric oxide (NO) and nitrogen dioxide (NO 2), the nitrogen oxides that are most relevant for air pollution. [1] [2] These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.
Nitrogen dioxide poisoning is the illness resulting from the toxic effect of nitrogen dioxide (NO 2). It usually occurs after the inhalation of the gas beyond the threshold limit value. [1] Nitrogen dioxide is reddish-brown with a very harsh smell at high concentrations, at lower concentrations it is colorless but may still have a harsh odour.
The California Air Pollution Control District Act of 1947 allowed 1 or more counties to form air pollution districts. [5] [6] The California Bay Area Pollution Control Act of 1955 created the Bay Area Air Pollution Control District. [5] [7] The California Mulford-Carrell Air Resources Act of 1967 resulted in the creation of 11 air basins. [5] [8]
Nitrogen dioxide (NO 2) Primary and Secondary 0.053 ppm (100 μg/m 3) annual Annual mean 40 CFR 50.11: Primary 0.100 ppm (188 μg/m 3) 1-hour 98th percentile of 1-hour daily maximum, averaged over 3 years 40 CFR 50.11: Lead (Pb) Primary and Secondary 0.15 μg/m 3: Rolling 3 months Not to be exceeded 40 CFR 50.12
San Diego is a city in Duval and Jim Wells counties, Texas, United States. The population was 3,748 at the 2020 census and 4,488 at the 2010 census . [ 4 ] It is located primarily in Duval County, of which it is the county seat .
One of several nitrogen oxides, nitrogen dioxide is a reddish-brown gas. It is a paramagnetic , bent molecule with C 2v point group symmetry . Industrially, NO 2 is an intermediate in the synthesis of nitric acid , millions of tons of which are produced each year, primarily for the production of fertilizers .
Duval County is a county located in the U.S. state of Texas.As of the 2020 census, its population was 9,831. [1] [2] The county seat is San Diego. [3]The county was founded in 1858 and later organized in 1876. [4]
The U.S. Department of Energy in 1991 estimated the installed retrofit cost per ton of SO 2 pollution control equipment (scrubbers) on existing units would be in the $665– $736/ton range. [30] However, 2005 was the first year the price of an SO 2 allowance reached this level.