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What are the gases released during rocket propulsion?
Different gases can be released by rockets depending on what fuel the rockets were using. There are many types of rocket fuels available - the purpose of the rocket will determine which fuel is the best option. For example, when the Space Shuttle took off, the fuel used was a mixture of liquid hydrogen and liquid oxygen, which meant that the exhaust cloud that one would see afterwards was made up of H2O, also known as water!