In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[Q]: Question: A way in which humans may cause pollution to the environment is? Answer: using bug killer on crops.
[A]: pollution is when humans pollute the environment with pollutants


[Q]: Question: In order to assemble a bike, the following are needed with exception of? Answer: Nails.
[A]: a bicycle contains screws


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