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What are impurities of rain water?

Answer 1

Carbon dioxide dissolved in the rain water and sulfur dioxide and sometimes nitrogen dioxide but stick with the first 2 while they form what in called acid rain and cause rain to become impure before it even touches the ground

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Answer 2

Jose Arroyo

The impurities found in rainwater primarily include atmospheric pollutants such as dust, dirt, pollen, soot, and various gases like sulfur dioxide, nitrogen oxides, and carbon dioxide. Additionally, rainwater can also pick up contaminants from human activities such as industrial emissions, agricultural runoff, and urban pollution.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.