prepared to do to tackle climate change in various ways. now, the understanding is that those e r pledges taken together will not reach what is considered the ultimate goal of this process. that is limiting global increase climate to 2 degrees celsius. that's not going to happen here. they're hoping they can lock these pledges in as a good start that will make a difference, that will limit temperature increases significantly, just not enough, and lock it into this process through an agreement that can be reviewed, improves with time, constantly policed and ensured that people are doing what they need to do. there's a lot of detail to be worked out, like the issue of whether it should be legally binding. many want it to be. others like the united states say no way, and the reality is whatever they come up with at the end, it's not going to keep everyone happy. for example, president obama today will be spending time with the leaders of small island