Mr. Brendan Murphy:

The technology is proven. As I said earlier, the scale of implementation is still fairly low, with some 18 plants operational across the world, another 20 or 25 in development and lots more planned. There has not been a massive roll-out of the infrastructure at this stage but the technology is proven. There is nothing about the technology that is difficult to do. The challenge has been in getting the numbers to work and the economics of it all.