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20. Which human practices will prevent the rapid negative changes in the earth’s ozone? I. Refraining from burning trash II. Riding a bike or walking when going to nearby places III. Using biofuels as alternative energy source IV. Use refrigerators and air conditioners that contain Chlorofluorocarbon

A. I
B. I and II
C. I, II and III
D. I, II, III, IV​


Sagot :

Answer:

im so sorry

Explanation:

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