Which of these sentences is an opinion a light pollution is an overuse of artificial light and can create negative ecological consequences or when it seemed a truly dark sky at night is one of the most magical experiences one can have next one the dark is a companion to reduce light pollution or like population can have adverse effects on wildlife in people alike

When it seemed a truly dark sky at night is one of the most magical experiences one can have.

Explanation:

an opinion is what someone thinks is true but someone else might thing a different way. In this case, the speaker thinks tha a truly dark sky at night is one of the most magical experiances someone can have. someone else might contradict this opinion by saying that its not a magical experiance. The first sentance isn't an opinion because it states that light pollution is an overuse of artificial light and it can cause bad consequences. this is a fact because it's true. The last sentance is a fact because it states something that is happening in the world as well.

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