what are five emissions from cars?

Answer 1

Here's an article that lists emissions from cars.

http://www.epa.gov/otaq/consumer/05-autos.pdf

Answer 2

Heres five off the top of my head:

Carbon Dioxide (the greatest in amount and the most important)

Nitrous Oxide, not as prevalent.

Water (this might surprise you, but any combustion reaction will result in CO2 and water. Just think about it- the law of conservation of mass tells us that matter cannot simply disappear, so just think about the reaction. Say we are burning a hydrocarbon- why not gasoline, thats common enough. Think about the name: hydro, for hydrogen, and carbon, for carbon. Where in CO2 (carbon and oxygen) do you find hydrogen? You don't- so it has to go somewhere. The answer is that it combines with oxygen, which is one of the ingredients in a combustion reaction, to form water (hydrogen plus oxygen.)

Carbon Monoxide (less prevalent)

Unburned hydrocarbons (like carbon monoxide, depends on how efficiently the engine burns the fuel, but general this is also less prevalent than CO2)

Answer 3

Cars emit a large variety of pollutants. The top five so-called "hazardous air pollutants" that come out of cars are (in order of amount per unit of exhaust):
1) benzene
2) formaldehyde
3) acetaldehyde
4) 1,3-butadiene
5) POM (polycyclic organic matter... a large group of pollutants)

Most hazardous air pollutants from cars are different species of hydrocarbons that are emitted as a result of incomplete combustion of petroleum (a complex mixture of hydrocarbons). Hydrocarbons are generally combusted more efficiently into CO2 and H20 when engines are operating at higher load factors. Idling cars emit these unburned hydrocarbons at a considerably higher rate.

Don't sit in parking lots and drive-throughs with your engine running. It's bad for the environment, your health, and lots of other people's health. And contrary to often-held belief, restarting your car after it's been running for a while does NOT emit more pollutants than idling (unless your car is pre-1985). If you have to sit somewhere for more than about 10 seconds, it's better to turn your car off.

Answer 4

5 emissions from cars...?

The ones that I am most concerned with are, in order...

1. WAY to loud "bass music"

2. Hormone raging teenagers.

3. The odd notes from certain brands of mufflers that make it sound like you fill up your car at Taco Bell.

4. The emissions from passengers of said auto that DID fill up at Taco Bell.

5. Differing items, such as bumpers, oils slicks, engine blocks, transmissions, etc. that fall of some ancient green-piecer's decrepit smoke belching 1974 ford LTD.

Answer 5

nitric oxide, carbon monoxide, hydrocarbons, carbon dioxide, water

Answer 6

fly ash