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.

[Q]: Fact: a phase change is when matter changes from one state into another state
[A]: All the water vanishes from a small depression basked in sunlight on a paved road because of?


[Q]: Fact: if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water
[A]: Which event can lead to the human caused change of an environment?


[Q]: Fact: a windmill does not create pollution
[A]:
What is safest to breathe around?