Answer: Methane
Notes: Methane is the most common gas that can cause explosions in coal mines. Methane is a colorless and odorless gas that is highly flammable and can easily be ignited by a spark or flame. When methane accumulates in high concentrations in the air in a coal mine, it can create a risk of explosion. This is why it is important for miners to monitor methane levels and take steps to prevent it from reaching dangerous levels.
