My next question is on balance of sources for electricity. It comes from a situation we have in Alberta, where they have expanded their electricity generated from wind, but they're beginning to bump up to limits as far as balancing in their system, balance on the electrical grid, because of the intermittent nature of wind. So here is a very broad question. How do Sweden and Germany try to find the optimal mix of various technologies to balance it out?
I know and understand that wind mixes very, very well with hydro and it doesn't mix quite as well with coal or other things. One, how do you find the maximum blend of sources for electricity? Two, is there an ultimate limit you view as possible for renewables, at which point renewables will tap out and no longer become practical?
Those are my two interrelated questions.