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ARC-Challenge / NCEOGA_2013_8_26 / Why is water from an aquifer more likely to be cleaner than water from other…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

Why is water from an aquifer more likely to be cleaner than water from other sources?

choices

  • because it forms where fresh and salt water meet
  • because it receives water directly from precipitation
  • because it rises to the surface near the ocean
  • because pollutants are filtered by rock and soil deep within Earth

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Source and history

Official source

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