respect to the other thing i was going to say is, that paris, look, remember the targets in paris, the ndcsare not binding. there's a binding transparency and accountability system, but not the target themselves. it had to be in my judgment done that way in order to get broad agreement, but it is a feature of paris and so if you think well how are we going to get the kind of ambition we need to get over time, there has to be a growing development of norms and expectations within countries of the world, not just within the negotiating community, but in the countries, to keep ramping up and ramp up more and more and faster and faster. you see the united states, the biggest historic emitter now, and the country which for so many years has beeiewed in all sorts of areas well belonds climate change, to use madeleine albright's phrase, indispensable power, never mind, what's the impact of that on that sense of developing norms and expectations. obviously not good. i think countries are still in, determined to go forward, want to implement the agreement, that's all great but don't underestimate th