Given a scientific passage and an answer, generate a question for the given answer.

[Q]: Passage: Volatile organic compounds (VOCs) are carbon compounds such as methane. VOCs are released in many human activities, such as raising livestock. Livestock wastes produce a lot of methane. Answer: methane
[A]: The waste of cows releases a lot of which type of gas?

[Q]: Passage: Did you ever have a picnic ruined by a surprise rainstorm? People often complain when the weather forecast is wrong. But in fact, weather forecasts today are much more accurate than they were just 20 years ago. Scientists who study and forecast the weather are called meteorologists . How do they predict the weather?. Answer: meteorologists
[A]: What do we call scientists who study and forecast the weather?

[Q]: Passage: Respiration is the process in which gases are exchanged between the body and the outside air. The lungs and other organs of the respiratory system bring oxygen into the body and release carbon dioxide into the atmosphere. Answer: respiration
[A]:
What is the process in which gases are exchanged between the body and the outside air?