[15] Characteristics of Urban Transportation Systems, (US Department of Transportation, Sept. 1992), Table 4-17; Walter H. Carson, ed., The Global Ecology Handbook: What You Can do about the Environmental Crisis, (Beacon Press, 1990), pp. 218-242; and Environmental Perspectives 1993, (Statistics Canada, National Accounts and Environmental Division, Mar. 1993), pp. 9-17.

Prohibitionist literature frequently compares guns with cars, indicating that firearms are more "deadly" than automobiles on a per use basis. This claim is false. For every kilometer travelled a light-duty passenger vehicle will emit (depending on cruising speed) between 1.7-4.1 grams of non-methane hydrocarbons, 16.2-43.0 grams of carbon monoxide, and 1.0-1.3 grams of oxides of nitrogen. A ten kilometer motor vehicle trip in an urban area contributes as much as .45kg (1lb) of pollutants into the atmosphere.

Carbon monoxide (much of it emitted from motor vehicles) impairs the ability of blood to carry oxygen, and affects the cardiovascular, nervous, and pulmonary systems. It contribute to ozone formation and indirectly to "greenhouse" warming.

Nitrous oxide damages the lungs and respiratory tract and contributes to the acidification of lakes, rivers, and soil.

Statistics Canada reports that in 1985, the transportation industry was the second highest contributor of "greenhouse" gases in Canada.

To infer that guns on a per use basis are more "deadly" to the human environment than motor vehicles is, quite simply, nonsense.