Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[EX Q]: Question: What should you learn that allows you to recognize and avoid the dangers of specific hazards when experimenting, such as flames or broken glass? Answer: lab safety symbols
[EX A]: Lab safety symbols warn of specific hazards, such as flames or broken glass. Knowing the symbols allows you to recognize and avoid the dangers.

[EX Q]: Question: What forces keep the moon orbiting the earth? Answer: gravitational
[EX A]: This photograph was taken by Apollo 8 crewmember Bill Anders on December 24, 1968, showing the Earth rising above the lunar surface. Gravitational forces keep the moon orbiting the Earth.

[EX Q]: Question: What can renewable resources can be replaced by? Answer: natural processes
[EX A]:
Renewable resources can be replaced by natural processes as quickly as they are used.