question: What sentence would provide a factual answer to this question: "Why is acid rain unhealthy?"

answer: acid rain has a negative impact on water quality
Problem: What is a random fact?

Answer: a tree can be replaced by planting a new tree
Problem: Generate a sentence that contains a fact.

humans changing an environment sometimes causes that environment to be destroyed
Problem: Generate a sentence that contains a fact.
Sentence: an animal requires nutrients for survival
Problem: Randomly generate a fact.

Random fact: a solution is made of one substance dissolved in another substance
question: What sentence would provide a factual answer to this question: "Humans are"

answer:
animals require water for survival