The North Slope of Alaska has concentrations of air pollutants comparable to the air pollutant concentration of some major cities on the east coast of the United States because А .the snowmobiles used by the people of the region pollute significantly more than cars and trucks
B .the region is currently undergoing an industrial boom
C .pollutants are transported by air from Eurasia
D .volcanoes in the region naturally release large amounts of particulates
E .the cold weather prevents the dissipation of pollutants