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395. Emissions of Greenhouse Gases, by Type and Source

[Emission estimates were mandated by Congress through Section 1605(a) of the Energy Policy Act of 1992 (title XVI). Gases that contain carbon can be measured either in terms of the full molecular weight of the gas or just in terms of their carbon content]

 
Type and source Unit 1990 1991 1992 1993 1994 1995 1996 1997 1998
prel.
 
Carbon dioxide:
  Carbon content, total.. Mil. metric tons 1,347.0 1,332.6 1,356.3 1,388.6 1,409.9 1,423.8 1,471.5 1,490.4 1,495.5
    Energy sources.. Mil. metric tons 1,345.2 1,330.0 1,351.3 1,378.2 1,398.3 1,411.7 1,460.5 1,480.0 1,485.4
    C02 in natural gas. Mil. metric tons 3.8 4.0 4.2 4.4 4.6 4.6 4.8 4.9 4.9
    Cement production. Mil. metric tons 8.9 8.7 8.8 9.3 9.8 9.9 9.9 10.3 10.6
    Gas flaring Mil. metric tons 2.5 2.8 2.8 3.7 3.8 4.7 4.5 4.2 4.3
    Other industrial. Mil. metric tons 7.3 7.2 7.2 7.1 7.2 7.6 7.9 8.0 8.0
    Other, adjustments.. Mil. metric tons -20.7 -20.0 -18.0 -14.2 -13.8 -14.7 -16.1 -17.0 -17.8
 
Methane:
  Gas, total. Mil. metric tons 30.19 30.47 30.55 29.85 30.05 30.20 29.30 29.27 28.84
    Energy sources. Mil. metric tons 10.77 10.86 10.82 10.10 10.11 10.34 9.87 10.09 10.09
    Waste management .. Mil. metric tons 11.12 11.09 11.05 11.01 10.90 10.85 10.70 10.36 9.87
    Agricultural sources.. Mil. metric tons 8.18 8.40 8.56 8.62 8.91 8.87 8.60 8.69 8.74
    Industrial sources Mil. metric tons 0.12 0.11 0.12 0.12 0.13 0.13 0.13 0.13 0.13
 
Nitrous oxide, total.. 1,000 metric tons 1,167 1,189 1,217 1,218 1,312 1,257 1,245 1,225 1,220
  Agriculture 1,000 metric tons 844 853 873 860 929 860 847 865 872
  Energy sources. 1,000 metric tons 210 220 231 240 255 268 265 269 271
  Waste management. 1,000 metric tons 17 17 17 17 18 18 18 18 18
  Industrial sources. 1,000 metric tons 96 99 95 100 110 111 115 73 58
 
Nitrogen oxide, total Mil. metric tons 21.23 21.31 21.55 21.78 22.05 21.53 21.26 21.36 (NA)
  Energy related. Mil. metric tons 20.08 20.31 20.55 20.80 20.91 20.53 20.15 20.22 (NA)
    Stationary source fuel combustion Mil. metric tons 9.85 9.75 9.89 10.05 9.96 9.79 9.52 9.70 (NA)
    Transportation. Mil. metric tons 10.23 10.56 10.66 10.75 10.95 10.73 10.64 10.52 (NA)
  Industrial processes.. Mil. metric tons 0.73 0.65 0.69 0.67 0.69 0.70 0.71 0.74 (NA)
  Solid waste disposal. Mil. metric tons 0.08 0.08 0.09 0.11 0.10 0.09 0.09 0.09 (NA)
  Other.. Mil. metric tons 0.34 0.26 0.23 0.20 0.35 0.21 0.31 0.31 (NA)
 
Nonmethane volatile organic compounds
   (VOC's), total. Mil. metric tons 18.89 19.02 18.63 18.79 19.39 18.56 17.42 17.34 (NA)
  Energy related Mil. metric tons 8.86 9.10 8.78 8.71 9.00 8.32 8.13 7.72 (NA)
    Stationary source fuel combustion.. Mil. metric tons 0.90 0.97 1.00 0.89 0.89 0.97 0.97 0.77 (NA)
    Transportation.. Mil. metric tons 7.95 8.13 7.77 7.82 8.11 7.35 7.16 6.95 (NA)
  Industrial processes Mil. metric tons 8.18 8.33 8.50 8.65 8.79 8.81 8.21 8.52 (NA)
  Solid waste disposal. Mil. metric tons 0.89 0.91 0.92 0.95 0.95 0.97 0.39 0.41 (NA)
  Other. Mil. metric tons 0.97 0.69 0.44 0.49 0.64 0.46 0.69 0.70 (NA)
 
Carbon monoxide, total.. Mil. metric tons 86.77 88.58 85.51 85.62 89.54 80.74 82.34 79.18 (NA)
  Energy related. Mil. metric tons 71.29 75.44 73.96 73.91 75.53 69.10 68.48 65.01 (NA)
    Transportation. Mil. metric tons 66.43 70.25 68.50 68.97 70.65 63.85 63.20 60.79 (NA)
    Stationary source fuel combustion Mil. metric tons 4.86 5.18 5.45 4.94 4.87 5.25 5.28 4.22 (NA)
  Industrial processes.. Mil. metric tons 4.33 4.19 4.12 4.22 4.19 4.18 4.19 4.36 (NA)
  Solid waste disposal. Mil. metric tons 0.98 1.01 1.03 1.13 1.11 1.07 1.09 1.12 (NA)
  Other.. Mil. metric tons 10.17 7.94 6.40 6.36 8.72 6.39 8.58 8.68 (NA)
 
  Carbon content of carbon monoxide. Mil. metric tons 37.21 37.99 36.67 36.71 38.40 34.62 35.31 33.95 (NA)
 
Chloroflurocarbons
   (CFCs) gases 1 1,000 metric tons 202 181 150 148 109 102 67 51 32
  CFC-11 1,000 metric tons 54 48 45 45 37 36 27 25 20
  CFC-12 1,000 metric tons 113 104 81 79 58 52 36 23 9
  CFC-113 1,000 metric tons 26 21 17 17 9 9 (Z) (Z) (Z)
  Other CFCs 1,000 metric tons 9 8 7 7 5 5 4 3 3
 
Halons 1,000 metric tons 3 3 3 3 2 3 3 2 2
Hydrofluorocarbons (HFCs). 1,000 metric tons 6 5 4 8 13 21 28 34 37
  HFC-23. 1,000 metric tons 3 3 3 3 3 2 3 3 3
  HFC-134a.. 1,000 metric tons 1 1 1 3 5 10 14 18 19
  Other HFCs.. 1,000 metric tons 2 1 0 2 5 9 11 13 15
 
Hydrochloroflurocarbons
  (HCFCs) gases 2 1,000 metric tons 80 80 84 82 93 107 119 120 129
  HCFC-22 1,000 metric tons 80 80 80 71 71 74 77 80 78
  HCFC-141b 1,000 metric tons 0 0 0 2 7 12 14 12 15
  HCFC-142b 1,000 metric tons 0 0 4 9 15 21 28 28 36
  Other HCFCs. 1,000 metric tons 0 0 1 3 6 7 7 8 9
 
Perfluorocarbons (PFCs). 1,000 metric tons 3 3 2 2 2 3 3 3 3
 
Other Chemicals:
  Carbon tetrachloride.. 1,000 metric tons 32 31 22 19 16 5 (Z) (Z) (Z)
  Methyl Cloroform.. 1,000 metric tons 158 155 108 93 77 46 0 (Z) (Z)
  Sulfur hexafluoride.. 1,000 metric tons 1 1 1 1 1 2 2 2 2


NA Not available.
1 Covers only CFC-11, CFC-12, and CFC-113.
2 Covers principally HCFC-22.

Source: U.S. Energy Information Administration, Emissions of Greenhouse Gases in the United States, annual.

http://www.eia.doe.gov/environment.html#GHG

* Carbon dioxide:

A colorless, odorless, non-poisonous gas that is a normal part of the ambient air. Carbon dioxide is a product of fossil-fuel combustion. Although CO2 does not directly impair human health, it is a greenhouse gas that traps the earths heat and contributes to the potential for global warming.

Chlorofluorocarbons (CFCs):

A family of inert, nontoxic, easily liquefied chemicals used in refrigeration, air conditioning, packaging, and insulation, or as solvents or aerosol propellan

Greenhouse gases:

Those gases, such as water vapor, carbon dioxide, tropospheric ozone, nitrous oxide, and methane, that are transparent to solar radiation but opaque to longwave radiation, thus preventing longwave radiation energy from leaving the atmosphere. The net effect is a trapping of absorbed radiation and a tendency to warm the planets surface.

Halons (Bromofluorocarbons):

Inert, nontoxic chemicals that have at least one bromine atom in their chemical makeup. They evaporate without leaving a residue and are used in fire extinguishing systems, especially for large computer installations.

Hydrochlorofluorocarbons (HCFCs):

Chemicals composed of one or more carbon atoms and varying numbers of hydrogen, chlorine, and fluorine atoms.

Hydrofluorocarbons (HFCs):

Chemicals composed of one or two carbon atoms and varying numbers of hydrogen and fluorine atoms.

Methane:

A hydrocarbon gas (CH4) that is the principal constituent of natural gas.

Methyl chloroform (trichloroethane):

An industrial chemical (CH3CCl3) used as a solvent, aerosol propellant, and pesticide and for metal degreasing.

Nitrogen oxides (NOx):

Compounds of nitrogen and oxygen produced by the burning of fossil fuels.

Nonmethane volatile organic compounds (NMVOCs):

Organic compounds, other than methane, that participate in atmospheric photochemical reactions.

Perfluorocarbons (PFCs):

Chemicals composed of one or two carbon atoms and four to six fluorine atoms, containing no chlorine. PFCs have no commercial uses and are emitted as a byproduct of aluminum smelting.

Volatile organic compounds (VOCs):

Organic compounds that participate in atmospheric photochemical reactions.

*



https://allcountries.org/uscensus/395_emissions_of_greenhouse_gases_by_type.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

Copyright © 2006 Photius Coutsoukis and Information Technology Associates, all rights reserved.