Negotiators representing nearly 200 nations on Saturday agreed to universal greenhouse gas emissions limits intended to mitigate global climate change. "It is not easy to find agreement on a deal so specific and technical," said Polish economist Michal Kurtyka, who is leading the United Nations negotiations. "Through this package you have made a thousand little steps forward together," he told the assembled delegates. "You can feel proud." U.S. negotiators sought to label coal a possible source of clean energy but also pushed for transparency and rules which apply equally to all participant nations.

Scroll for 5 things you
need to know now