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: as a source of light moves directly overhead of an object , the size of the shadow of that object will decrease
[A]: as a source of light moves directly overhead of an object , the size of the shadow of that object will do what?


[Q]: Fact: solar energy is an inexhaustible resource
[A]: A person needs to make a stove run with only energy that will run forever, so they make a?


[Q]: Fact: polluting means something poisonous is added to an environment causing harm to the environment
[A]:
Factories often add something to the environment that is?