There are many different types of gas that can be used with a charcoal grill. Some common ones include propane, natural gas, and briquettes. However, using propane is not safe because it’s a fuel source that contains benzene, which is an air pollutant. When the propane is burned to create heat, it also produces carbon monoxide and other hazardous byproducts. Briquettes are safer than using propane because they do not produce any toxic fumes or emissions when burned. They also generate a lot more heat for cooking and give you a smoky flavor without being overpowering like some other fuels like natural gas or liquid charcoal could be.