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

Respuesta :

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.

the answer is A) concentration of industrial factories  



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