if it runs on pure hydrogen then the only exhaust will be pure water vapor.
carbon monoxide is in exhaust gas
The emissions are mainly nitrogen, carbon dioxide, NOx, water vapour and unburned hydrocarbons
Engine exhaust.
carbon dioxide
It comes out of your exhaust, in the engine it combusts making your car propel forward, the vaporized gasoline exits your exhaust.
The black gunk that comes out of the exhaust pipe when starting the car is probably carbon buildup within the exhaust system. Carbon buildup happens when the engine is not burning fuel as efficiently as it can.
Carbon monoxide comes out of a car. This colorless gas that is released from a car's exhaust is poisonous when inhaled in a highly concentrated form.
Neither. It's a vapor (gas).
Do you have an exhaust leak? Do you happen to have have an exhaust leak or a damaged water pump bearing?
It varies by car, year and engine.
Clean the mouse nest out of the air cleaner.