The study of the distribution of objects across Earth's surface and the processes by which human and environmental phenomena move from one place to another is

Each side has to be less then the sum of the other two sides.a, b, c, and e work.

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.”

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