Answer:
Chemicals released by smokestacks (chimneys) can enter the atmosphere and then fall back to earth as rain, entering seas, rivers, and lakes and causing water pollution.
Drilling rigs injects a mixture of water and chemicals into rock formations to release oil and gas. As a result, it generates huge volumes of wastewater with dangerous chemicals that can leak to ponds, lagoons and underground aquifers
An abstract noun is a noun that does not refer to a physical object, but rather to an idea: an example of an abstract noun is "respect" so the correct answer is C.respect
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must be earned</span>