The technical term 'lean-burn' originally refers to less polluting versions of what energy technology?
Petroleum engine Internal-combustion engine Fossil fuel vehicle Charge (engine) Internal combustion engine vehicle AFFICEV I c engines Engine idling Internal combustion engine Reciprocating internal combustion engine Traditional vehicle Internal combustion Vehicle with an internal combustion engine Internal Combustion Engines Car Motor Engine type IC engine Internal Combustion Car engines Internal combustion gasoline engine Internal Combustion Engine Internal combustion engines Petroleum fuel engine Conventional car Internal combustion piston engine APICEV Car engine Internal-Combustion Engine Fossil fuel internal combustion engine Combustion engines Fossil fuel engine Gasoline/Petrol engine ICEV Internal-combustion Combustion car All-petroleum internal combustion engine vehicle
fossil fuel vehicle engine type internal combustion internal combustion gasoline engine fossil fuel engine internal combustion engine vehicle icev car motor engine idling fossil fuel internal combustion engine internal combustion engines petroleum fuel engine vehicle with internal combustion engine car engine ic engine combustion engines conventional car charge engine reciprocating internal combustion engine car engines i c engines apicev combustion car traditional vehicle internal combustion engine internal combustion piston engine afficev petroleum engine gasoline petrol engine all petroleum internal combustion engine vehicle
internal combustion engine
WikipediaEntity
Internal combustion engine