# Some liquid products are sold in aerosol cans. Gas is stored in a can under pressure and is used to propel the liquid out of the can. Why shouldn't an aerosol ever be thrown into a fireplace or incinerator?

Pressure cookers work on this principle, as food can be cooked at higher temperatures than $100$ ""^@C. Pressure cookers have safety valves, that will operate if the internal pressure becomes too high.