Ocean water is the coldest at the?
a. poles
b. equator
c. shallow areas
d. coastlines of north america

The answer to your question would be A.Poles
I think this is right. :/

Hello there.

Ocean water is the coldest at the? 

A. Poles

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.”