What energy-producing chemical reactions might contribute to the greenhouse effect?
Combustion of almost all fossil fuels
Carbondioxide, which is a main greenhouse gas, is a gas that is responsible for greenhouse effect.
Methane (for instance) forms carbondioxide when it is used as a fuel
All fossil fuels form carbondioxide when they are incinerated. Nuclear energy plants are thought to be safe in terms of the greenhouse gasses. But mining radionuclides, transport nuclear fuel, etc. cause carbondioxide emissions due to the fact that motor vehicles emit cardondioxide when they are operated.