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Botkin Environmental Science Earth as Living Planet 8th txtbk

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468 CHAPTER 21 Air Pollution<br />

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global dimming <br />

0.01<br />

Greatest<br />

lung<br />

damage<br />

Tobacco smoke<br />

Oil smoke<br />

Automobile<br />

exhaust<br />

SO 2<br />

mist<br />

Very fine<br />

particulates<br />

Sea salt particles<br />

0.1<br />

Cement dust<br />

Coal dust<br />

Fly <strong>as</strong>h<br />

Fog<br />

Suspended<br />

<strong>as</strong>bestos<br />

Ground stone<br />

Pollen<br />

1 10 100<br />

Particle size (m)<br />

Rain<br />

Human hair<br />

Beach sand<br />

1,000<br />

10,000<br />

FIGURE 21.4 Sizes of selected particulates. The shaded area<br />

shows the size range that produces the greatest lung damage.<br />

(Source: Modified from Fig. 7–8, p. 244 in Chemistry, Man and<br />

<strong>Environmental</strong> Change: An Integrated Approach, by J. Calvin<br />

Giddings. Copyright © 1973 by J. Calvin Giddings. Reprinted by<br />

permission of Harper Collins Publishers, Inc.).<br />

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Lead<br />

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)

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