The United Nations twenty-fourth annual climate conference concluded on Dec. 15, following a week of intense discussions culminating in the adoption of rules for the implementation of the Paris Agreement, which aims to prevent the worst impacts of climate change by keeping global temperature rise below 2 degrees Celsius. The deal establishes uniform standards that will be used by all 197 parties to the United Nations Framework Convention on Climate Change to measure their emissions and keep track of the progress of their climate policies. The conference, which took place in Katowice, the heart of Polish coal country, was marked by delays and disputes over reporting rules, financing obligations, and emissions accounting for the international climate agreement. International efforts to curb climate change have faced significant challenges, from persistent climate denialism to major governments such as the United State retreating from multilateral cooperation. The United States agreed to the deal despite President Trump’s vow to abandon the Paris Agreement, which the nation can not do until 2020.