1.

Compared to 50 years ago, the thinning ozone layer has produced dramatic increases in cases of: 1. asthma          2. color blindness 3. cataracts        4. skin cancer Which of the above is/are correct?

A.  1 and 2          
B.  3 and 4
C.  1, 2 and 3                    
D.  All of these
Answer» C.  1, 2 and 3                    


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