Final answer:
Rain can become acidic due to industrial emissions of various substances including mercury, carbon dioxide, sulfur dioxide, sulfates, and nitrogen oxides.
Step-by-step explanation:
Rain, and other types of precipitation, can become acidic due to industrial emissions of several substances, including mercury, carbon dioxide, sulfur dioxide, sulfates, and nitrogen oxides. These emissions are released into the atmosphere as a result of various industrial activities, such as burning fossil fuels and industrial processes. When these substances combine with water in the atmosphere, they can form acids and contribute to the acidity of rain.
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