What health problems can pollution cause? - ANSWER Respiratory issues
How much less air pollution do we have now than in the 1960s? (%) - ANSWER 98% less
What percent of air pollution is caused by vehicles? - ANSWER 20%
What is the average thermal efficiency? (%) - ANSWER 20%
Where does 80% of the rest of the fuel go to? - ANSWER Friction, heat, and emissions
What are the 5 major pollutants? - ANSWER Hydrocarbons (HC), Carbon monoxide (CO),
Oxides of nitrogen (NOx), Sulfur dioxide (SO2), and particulate matter
What are hydrocarbons? - ANSWER Unburned fuel of carbon and hydrogen
What are hydrocarbons emitted through? - ANSWER Incomplete combustion and fuel
evaporation
What are hydrocarbons caused by? - ANSWER Misfire, rich, ignition timing, engine defi-
ciencies, and fuel injectors
What has lowered hydrocarbons? - ANSWER OBD 2, component controls, fuel delivery,
ignition, emissions system, and EVAPs
1
, Can you see or smell carbon monoxide? - ANSWER No
Is carbon monoxide harmful or nonharmful? - ANSWER Harmful
How is carbon monoxide made? - ANSWER Incomplete burning of fuel
What is carbon monoxide caused by?` - ANSWER rich, dirty air filter, fuel injectors, high
fuel pressure, defective sensors, plugged PCV valve, heat riser valve stuck open, air pump
malfunction, oil diluted with gas
How is nitrogen oxide made? - ANSWER Combustion of fuel at high temperatures
What is nitrogen oxide the cause of? - ANSWER Acid rain
What type of health issues does nitrogen oxide cause? - ANSWER Respiratory issues
What is nitrogen oxide caused by? - ANSWER lean, defective EGR, high temperature, vac-
uum leaks, advance ignition timing
What can too little or too much oxygen cause? - ANSWER Improper combustion
What is too little oxygen caused by? - ANSWER rich, dirty air filter, fuel injectors, high fuel
pressure, defective sensors, restricted PCV valve, EVAP purges at idle
What is too much oxygen caused by? - ANSWER lean, misfire, vacuum leak, exhaust leak
Where is ozone/smog made at? - ANSWER Ground level
2
How much less air pollution do we have now than in the 1960s? (%) - ANSWER 98% less
What percent of air pollution is caused by vehicles? - ANSWER 20%
What is the average thermal efficiency? (%) - ANSWER 20%
Where does 80% of the rest of the fuel go to? - ANSWER Friction, heat, and emissions
What are the 5 major pollutants? - ANSWER Hydrocarbons (HC), Carbon monoxide (CO),
Oxides of nitrogen (NOx), Sulfur dioxide (SO2), and particulate matter
What are hydrocarbons? - ANSWER Unburned fuel of carbon and hydrogen
What are hydrocarbons emitted through? - ANSWER Incomplete combustion and fuel
evaporation
What are hydrocarbons caused by? - ANSWER Misfire, rich, ignition timing, engine defi-
ciencies, and fuel injectors
What has lowered hydrocarbons? - ANSWER OBD 2, component controls, fuel delivery,
ignition, emissions system, and EVAPs
1
, Can you see or smell carbon monoxide? - ANSWER No
Is carbon monoxide harmful or nonharmful? - ANSWER Harmful
How is carbon monoxide made? - ANSWER Incomplete burning of fuel
What is carbon monoxide caused by?` - ANSWER rich, dirty air filter, fuel injectors, high
fuel pressure, defective sensors, plugged PCV valve, heat riser valve stuck open, air pump
malfunction, oil diluted with gas
How is nitrogen oxide made? - ANSWER Combustion of fuel at high temperatures
What is nitrogen oxide the cause of? - ANSWER Acid rain
What type of health issues does nitrogen oxide cause? - ANSWER Respiratory issues
What is nitrogen oxide caused by? - ANSWER lean, defective EGR, high temperature, vac-
uum leaks, advance ignition timing
What can too little or too much oxygen cause? - ANSWER Improper combustion
What is too little oxygen caused by? - ANSWER rich, dirty air filter, fuel injectors, high fuel
pressure, defective sensors, restricted PCV valve, EVAP purges at idle
What is too much oxygen caused by? - ANSWER lean, misfire, vacuum leak, exhaust leak
Where is ozone/smog made at? - ANSWER Ground level
2
