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.

[EX Q]: Question: Cars are big polluters because they release toxins from the gas into the air making it? Answer: unhealthy to breathe.
[EX A]: polluting means something poisonous is added to an environment causing harm to the environment

[EX Q]: Question: Which type of vegetation could you find in areas with low rainfall? Answer: cacti.
[EX A]: a desert environment has low rainfall

[EX Q]: Question: A thing may be changed on a chemical level after? Answer: setting it on fire.
[EX A]:
chemical reactions cause chemical change