Combustion Gases 2 topics · 2 sources ScienceEnergyThe gaseous byproducts of the combustion of a fuel.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite Science› EnergyRenewable EnergyThe gases released from a combustion process.Oregon Dept of Energy — ODOE Glossary of Energy Terms retrieved 2014-06-15 Cite