100 points
what chicago grow into a major city in the 1800s?

a. the boom in canal building and railroad building

b. its incorporation of other cities' hinterlands

c. the development of wealth-producing service industries

d. its location near large oil and coal deposits

D. Its location near large oil and coal deposits

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”