Acid rain usually has a pH value of LESS than ________
What will be an ideal response?
Answer: 5.6
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Wastewater renovation relies on what processes to purify water?
A) advanced treatment with carbon filters B) well-designed septic systems C) natural purification in the soil D) anaerobic degradation in the groundwater
If you examine the changes in day-by-day electrical demand in the United States, the pronounced daily drop in electrical consumption is most closely associated with
A) people going to work. B) people sleeping. C) home heating and cooling systems. D) daytime activities that consume little energy.
Chile's economy is strong, and though it relies heavily on ________ exports to China, it has diversified its exports
A) automobile B) copper C) oil D) agricultural
Animals or plants living on the sea bottom are ________
A) fish B) benthos C) nekton D) xerophytes E) part of the lithosphere