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Source: Council on Environmental Quality, 1993.

Notes: Estimates of emissions from transportation sources have been recalculated using a revised model. These estimates supersede those reported in 1992's report and are not directly comparable to historical estimates calculated using different models. PM-10 refers to particulates with an aerodynamic diameter smaller than 10 jm. These smaller particles are likely responsible for most adverse health effects of particulates because of their ability to reach the thoracic or lower regions of the respiratory tract. Detail may not agree with totals because of independent rounding.

Source: Council on Environmental Quality, 1993.

Notes: Estimates of emissions from transportation sources have been recalculated using a revised model. These estimates supersede those reported in 1992's report and are not directly comparable to historical estimates calculated using different models. PM-10 refers to particulates with an aerodynamic diameter smaller than 10 jm. These smaller particles are likely responsible for most adverse health effects of particulates because of their ability to reach the thoracic or lower regions of the respiratory tract. Detail may not agree with totals because of independent rounding.

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