Propane is a colourless, odourless, non-toxic gas that is heavier than air. It is extracted from natural gas or refined using petroleum. In Quebec, 75% of propane gas comes from natural gas extracted from Canada’s Western provinces and the remainder is refined in Quebec using petroleum. Propane gas is stored in liquid form under pressure to facilitate transportation and storage. Since propane is primarily used in gas form, tanks are filled to 80% so that the liquid gas may expand and return to its gaseous form before entering your propane-powered devices.