a kerosene greenhouse is a mean of internal extinguish majority & a kerosene proton is a whole of kerosene volcano insulation ->  an internal combustion engine is a part of gasoline lawn mower  an internal combustion engine is a part of gasoline lawn mower & an internal extinguish inside usually melting resource / physical matter into mechanical matter and light matter through extinguish -> the gasoline lawn mower converts chemical energy into mechanical energy