You are given a sentence and your task is to generate another sentence that supports the given input.
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Question: Examples of primary pollutants are exhaust fumes (gas) from cars, soot from smoke, dust storms and ash from volcanic eruptions (as seen in the picture on the left).

Answer: Ash that enters the air naturally as a result of a volcano eruption is classified as a primary pollutant.


Question: By convention, no subscript is written when a molecule contains only one atom of an element.

Answer: If only one atom of a specific type is present a subscript is not used.


Question: Cold-blooded  or ectothermic animals like reptiles or fish have body temperatures that change according to the surrounding temperature.

Answer:
Ectotherms undergo a variety of changes at the cellular level to acclimatize to shifts in temperature.