You know I think that that were obviously in the last period of trying to get this rulebook done. I think that there are still some open issues and left a lot of progress has been made. It's a little bit hard to say with the text (with) still ongoing negotiations--it's a little hard for me to predict exactly. I think broadly speaking, the Paris Agreement was built on a number of important innovations with regard to the way climate negotiations had happened. It developed a kind of hybrid between bottom-up and top-down approach.
So, one of the most important elements of the agreement was the nationally determined nature of essentially the targets, but in the lingo nationally determined contributions. Without that you wouldn't have had an agreement because the premise was that it was to be an agreement that involved everybody. This was not going to be the kind of effort that was embodied in Kyoto where we had one side--developed countries--required to take action. We were moving away from that, and that really was the premise then the only way that we saw to have an agreement that could cover everybody was to make it nationally determined--to have a bottomup so that countries could, hopefully with as much information as possible, could make their own choices about what was what worked for their own country their own economy. So that you could immediately take out of the equation a concern that a country would be forced to do things that were inconsistent with their core priorities of growth development poverty eradication and so forth. So that was the key that opened the door to being able to do an agreement. At the same time there are some elements that are more topdown which is not intended to mean and shouldn't mean overly burdensome and cumbersome but in which you have certain rules, procedures and guidelines with respect to essentially the accountability aspects of the agreement. So, it's not nationally determined to decide whether you're going to do a nationally determined contributions. You need to do that. There is a there are rules being written right now about how the transparency and review system would work. And that's not it's not every country deciding for themselves how they're going to report and how they're going to be reviewed. That's got to be that that's got to be an effort that involves all countries.