Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.
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Question: Fact: treating water is used to remove harmful substances before drinking

Answer: The water treatment plant boiled all the water that came to them for what reason?


Question: Fact: landfills have a negative impact on the environment

Answer: Which is a positive impact on the bio environment?


Question: Fact: being stronger usually has a positive impact on an living thing 's health

Answer:
A thing which has great physical capacity is most likely?