10 Which of the following is true about rocks? A. rocks do not contain any mineral matter
B. coal is not considered a true rock
C. rocks are composed of only one mineral
D. there is one type of rock

B. coal is not considered a true rock

Explanation:

It is true that coal is not considered a true rock this is because, it made up of organic matter.

A rock is an aggregate of minerals. Minerals that form rocks are made up of inorganic substances that are naturally occurring and they have a definite composition.

Coal is a made up of the element carbon. This element in coal is sourced from an organic origin.

Therefore, coal, although a rock does not really satisfy the definition of a true rock.

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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