An incinerator (200)is provided for burning combustible refuse (16) in a primary combustion chamber (2) that has an outlet (50) for exhaust heat (30) and an inlet (28) for receiving refuse (16) and an inlet (36) for receiving a mixture of pressurized oxygen and pressurized hydrogen at respective rates correlated to create a burn temperature within chamber (2) of at least 4000.degree. F. to provide exhaust heat that is more environmentally acceptable.