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: A ball rolling over carpet will go ______ than a ball rolling over concrete.? Answer: slower.
[EX A]: as the roughness of something increases , the friction of that something will increase when its surface moves against another surface

[EX Q]: Question: With a ruler I can measure? Answer: a phone.
[EX A]: a ruler is used for measuring the length of an object

[EX Q]: Question: Natural resources come from nature, so if humans are reckless when working with nature, the amount of resources will? Answer: go down.
[EX A]:
nature is the source of natural resources