 I think that many people have said that the actions of countries like the United States and China are critical because they send a signal to the other actors, those whose emissions may be less, of what is the direction, what is the path forward and what are those who are best situated to address this problem going to do about it. So the fact that the United States and China last November stood together, President Obama and President Xi and Beijing stood together and announced the actions that they intend to take I think was electric in the world. It sent a very, very positive signal to the negotiators who met later in Lima of what they could expect and I think it presented a kind of challenge to other countries to step forward as well. If these two countries who so often in the past have had very distinct differences could come together in this way and take this action together, it's a very positive sign for the world really.