Besides ball courts, what are two other examples of Mayan monumental construction?

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.”

Brand c i think that should be it

Answer barren with few trees, in the northern hemisphere;

answer is. c