I want to know the answer to the following question:
Who discovered carbon dioxide or fixed air?
All the background I'm provided with is that "The experiments of Lavoisier were used to create the first modern chemical plants in Paris, and the experiments of the Montgolfier Brothers enabled them to launch the first manned flight in a hot-air balloon on 21 November 1783, from the Château de la Muette, near the Bois de Boulogne.". Is that enough to answer the question?
Answer: no