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Liomustafa Liomustafa
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6 years ago
When did the thinning of the ozone layer over the Arctic become so noticeable that people dubbed it the ozone hole?
 
  a. Early 1990s
 b. Early 1960s
 c. Mid 1980s
 d. There is no ozone hole about the Arctic.
 e. Mid 1970s

Question 2

When a cigarette filter is discarded on the side of the road or in the grass it will last for ________ before it is finally broken down.
 
  a. 2 weeks
 b. 2.5 years
 c. 6 months
 d. 3 days
 e. 10 years
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fayez_83fayez_83
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6 years ago
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Liomustafa Author
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#2
6 years ago
Thank you soooo very much, it was really helpful and kind of you to answer my q's
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#3
6 years ago
You're welcome, once again
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