Carbon Dioxide of course!
methane
If it's a fossil fuel, then the gases produced are mainly CO2 (carbon dioxide). Other gases include sulphur and sometimes methane
Electric cars reduce the amount of fuel-dependent cars on the road. As more electric cars are produced, the US will need fewer barrels of gas.
When polyethylene is burnt carbon dioxide and water vapors are released.
gas cars - I assume you mean LPG. This is a by-product from oil well-heads and used to be flared (burnt) off. Then it was realised it had a value as an auto fuel, especially when energy porices went up - spud
The gas produced by the burning of fuel is carbon dioxide.
Carbon monoxide.
obviously gas obviously gas
Hydrogen gas
All cars would use compressed air (or nitrogen) to inflate tyres. Most cars would use petrol or diesel as a fuel (in the US petrol is known as gas). Some cars use Propane gas as a fuel. Technology is being developed to fuel cars with Hydrogen gas.
On cars with fuel injection it is in the fuel tank. On cars with a carburetor it can but most likely is mounted on the engine block.
When brimstone (sulfur) is burned with oxygen, sulfur dioxide gas is produced. This gas has a pungent odor and is often responsible for the characteristic smell of burnt matches.