Which chemical reaction produces energy by combining hydrogen and oxygen?

Combustion

The combustion of hydrogen in the presence of oxygen produces water as the sole product and releases a large amount of energy, making this reaction a potentially clean and renewable energy source. Unlike fossil fuels, the combustion of hydrogen does not produce carbon dioxide, a greenhouse gas. This makes it an attractive option for powering vehicles and generating electricity in the future, with water as the only by-product. Current research aims to make hydrogen more accessible and economical as a fuel, which could revolutionize our energy system by reducing dependence on fossil fuels.