I would agree entirely. Both types of tools are going to be needed and for different things. Clearly, there's a very significant role that standards and regulations can play on the one hand, but we also know that in some circumstances incentives are also very effective.
I don't want to keep harking back to our climate change commitments, but let me hark back to our climate change commitments just for a moment. If we're going to start meeting those things, it's going to have to be all of the above to be able to get us to move effectively in that direction.