What are the ways in which environment can be polluted without any harm?? XD

Additionally , environmental pollution is triggered by the indroduction of harmful materials , such as gaseous pollutants , toxic metals , and particulate matter (PM) into the atmosphere .

Explanation:

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Additionally, environmental pollution is triggered by the introduction of harmful materials, such as gaseous pollutants, toxic metals, and particulate matter (PM) into the atmosphere; sewage, industrial effluents, agricultural runoffs, and electronic wastes into water bodies; and activities such as mining

b. heterotroph

explanation:

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.