That's a very important question for anyone. You have to make a lot of assumptions as to the ridership, but also as to how you're going to generate the electricity needed to move those trains. If it's all green electricity from solar or wind power, you're going to have a zero greenhouse gas net result.
The City of Calgary is running all of its trains on wind power, so they have a truly zero emission light-rail transit system. In Ontario, we still burn fossil fuels to generate some of the electricity, so if that continues there will never be a zero-emission type system.
These numbers are difficult to come by for anyone, because either we have to make a lot of assumptions, or somebody has to give the parameters as to what we need to take into consideration to make the calculation.
I'll give you a little example. We talk about greenhouse gas emissions for different modes of transport, and 8% was for rail, I believe is the number—