the effect on poorer countries. can they come together in agreement here? >> reporter: well, christine, it's pretty powerful argument when you lay it out like that, but of course it requires wealthy countries like the u.s. and the european union to pony up the cash. that's something in this environment that perhaps is a bit of reticence to do that. you've also had this feeling from the u.s. and others, they don't want to be -- get into an issue of open-ended liability. court cases when it comes to other nations suing the u.s. and others to deal with the effects of climate change but the u.n. secretary general flew back into those meetings trying to hammer out the deal in the coming hours. he said that nations need to work together. >> there has been clearly in the past times a breakdown in trust between north and south and between developed and emerging economies. the but this is no time for