Well, I think it drains the capital or resources we need to tackle the problem. What we have said now for seven years is that we need to be part of the global effort and to make a serious effort, but we'd be much better off putting our resources into advancing technology that everybody needs, and that we in particular need, rather than simply paying somebody else who's managed to get a less aggressive target.
So our answer is, sure, take on a burden, but put it into technology that the world needs a lot more investment in.