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Canadian Clean Air Day

Question 1 - 4

Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
1.
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‘Canadian Clean Air Day' will be held on 
2.
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Air pollution may be responsible for  deaths every year in Canada.
3.
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The sector most responsible for smog-producing pollutants is 
4.
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Scientists now know that even  of pollutants can be harmful.
1.
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‘Canadian Clean Air Day' will be held on 

Giải thích chi tiết theo Linear

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