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16 March, 14:28

The map shows levels of air quality in parts of the United States and Canada. What is a contributing factor to the areas with unhealthy levels?

A) concentration of industrial factories

B) large farming populations

C) exposure to ocean water

D) erosion of beach sand

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Answers (1)
  1. 16 March, 14:40
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    Well I'd say the answer is most likely A.) Concentration of industrial factories. The other options don't really make sense or connect to contributing factors of pollution.
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