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.

[Q]: Question: What kind of resource is soil? Answer: renewable
[A]: Soil is a renewable resource. Sometimes it is lost faster than it can be replaced.

[Q]: Question: In a hydrogen replacement reaction, the hydrogen in the acid is replaced by what? Answer: an active metal
[A]: In a hydrogen replacement reaction, the hydrogen in the acid is replaced by an active metal.

[Q]: Question: What is the organ in which gas exchanges take place between blood and air? Answer: lungs
[A]:
Respiration begins with ventilation. This is the process of moving air in and out of the lungs. The lungs are the organs in which gas exchange takes place between blood and air.