To give you an idea, a Westport engine—they call it a GX—is actually a Cummins engine, the 15-litre ISX, that used to run on diesel. The EPA developed a program of certification for this Cummins ISX engine, including a catalytic converter, a PDF, and injection of urea into the exhaust system, and all this to meet the EPA requirements.
On that same engine, Westport changed the injector and modified the ECM, which is a computer that runs the engine. That's all they did, and instead of introducing diesel into it, you have a drop of fuel that creates the fire on the piston; then comes the LNG that creates the explosion, and the piston goes down. That's all there is.
Now you are burning 95% LNG, which is a clean gas when you compare it with diesel. Trust me or not, they applied the same damn regulation to the GX engine made by Westport that they applied to the Cummins ISX engine. This is the same engine. If I were to show it to you, you would never see the difference unless I told you; however, in terms of the emissions, one is virtually at zero naturally, while the other one has to go through three processes to get to half that level.
These three cans cost $20,000 per truck, and you still have to have them on the trucks when you use natural gas, which is ridiculous, because you burn only 5% diesel.
In the meantime, they have just authorized Navistar and other manufacturers. Instead of injecting the natural gas to the piston with an injector, these manufacturers put it into the intake, where the air goes into the engine. They throw the natural gas in there, and they use up to about 50% natural gas and 50% diesel. For them, this is fine—no problem.
You wonder about the EPA attitude, and now everybody is reacting. Even the Americans are saying it's ridiculous, because the largest buyers of Westport technology are certainly not Canadians. We've probably sold 75 trucks in Canada so far this year; in the United States, they have probably sold 2,000 trucks, so the EPA is not done for Canadians.