There are actually many reasons why emissions are important. For starters, we are sure that you are aware of the fact that you will not be allowed to drive the vehicle in the event that you fail emissions tests. This basically means that if your car is considered to be too dangerous for the environment, you will have to keep it in a garage or get the problem solved.
It should be noted that improper emissions can be a sign that there is something wrong with your engine. While the tests would not stop you from driving the car as everything is within limits, in the event that the emissions have a different color than usual or they grow in quantity, it is a really good idea to go to a mechanic. If you act fast you will save a lot of money on repairs that you might need in the future. On the whole we can say that emissions are important because they offer indicators about how well the vehicle is operating. Always use the best possible gas and do not overlook problems that are noticed in the emissions system. Only bad things can happen when you do that.