This is a cool site to learn about emissions trading. EBS is in the business of buying and selling credits. But they also are a clearing house of information to their prospective clients and provide other services. They have a video shows you how emissions trading would help to cut emissions by taking it from an old factory and giving it to a new one. They also have a page that kind of defines emission trading by saying how it could help to clean up the air and gives a brief history of it. This is definately a site to visit if you want to see how the NOx and SOx emissions trading market is going or would like to be a part of it.