"Fair is foul, and foul is fair: 

 Hover through fog and filthy air." 

 (Macbeth. Act 1, sc. I, line 12). 



No, it didn't happen overnight. 

 The problem of polluted air has 

 been festering for centuries — wit- 

 ness Shakespeare's Macbeth, 1605. 



It's just that suddenly the problem 

 of air pollution is becoming critical 

 and is erupting in our sight. Not only 

 do our eyes smart as they focus 

 through murky air, but when the air 

 clears, we see trees and vegetation 

 succumbing. We must realize that 

 this destruction can no longer be 

 pinned to some mysterious cause. 

 The one major culprit is air pollu- 

 tion. 



Air Pollution: 



Where does it come from? 



Today's air pollution is an unfor- 

 tunate by-product of the growth of 

 civilization and civilized man's de- 

 sire for goods that require heavy 

 industrialization and mass produc- 

 tion. Machines and factories some- 

 times pollute and taint the air with 

 substances that are dangerous to 

 man and the environment. These in- 

 clude radioactive dust, salt spray, 

 herbicide and pesticide aerosols, 

 liquid droplets of acidic matter, 

 gases, and sometimes soil particles. 

 These substances can act alone to 

 irritate objects and forms of life. 

 Or, more dangerously, they join to- 

 gether to act upon the environment. 



Only lately have we begun recog- 

 nizing some of their insidious con- 

 sequences. 



