Which of the following statements about ozone are true? select the two correct answers. 1 .ozone at ground level is harmful to human health. 2. ozone in the upper atmosphere protects earth from the suns rays. 3. ozone is for reducing smog levels. 4. trees and plants to decrease levels of ozone in the atmosphere. 5. most ground level ozone is released by vehicles.
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Which of the following statements about ozone are true? select the two correct answers. 1 .ozone at...
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