The geographic grid consists of two sets of lines; and
a.) physical; human
b.) local; regional
c.) latitude; longitude
d.) large scale; small scale

answer is C) latitude; longitude

lattitude lines are the horizontal lines that run parallel (eg: equator)
longitude lines are vertical lines that meet at the poles (eg: prime meridian) 

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.”

I’m guessing probably a