There is several things that you can do to help decrease your vehicles Emissions. One of the biggest tells that you should look for that your vehicle is producing excessive amounts of emission is that light that comes on on your dash that say Check Engine.
The check engine light on the dashboard is a warning that many vehicle owners dread. The check engine light is a signal that the onboard diagnostics system (or OBD II) has detected a malfunction in the vehicle’s emissions, ignition, fuel or exhaust systems. It could be caused by something as simple as a loose gas cap or a faulty oxygen sensor or spark plug or something as severe as a faulty catalytic converter or major engine problems, so you shouldn’t ignore it. All cars and light trucks have onboard diagnostics that are supposed to detect engine-related problems that affect the emissions control systems.
The check engine light (typically a yellow or orange outline of an engine with the word “Check” or “Service Engine”) should come on for a few seconds every time you start the engine with other warning lights. If it stays on, that means there is a problem. If your check engine light is flashing or blinking rather than staying illuminated, it indicates a serious problem that needs to be dealt with right away. Many of the common causes of an illuminated check engine light are simple and easy to solve, but sometimes, an engine light means something serious has gone wrong.
Other things that can be done is to limit the amount of Idling.
Conventional automotive wisdom once suggested that idling a vehicle for several minutes can effectively warm up its engine. But the EPA notes that idling is both ineffective and harmful to the environment. Idling for more than 30 seconds can increase air pollution unnecessarily, waste fuel and money and cause excessive wear and damage to engine components. Auto manufacturers now recommend that vehicles idle for no more than 30 seconds before they begin driving, as modern engines take less time to warm up than the engines of yesteryear.