The websites of intergovernmental organizations can provide much valuable information.
The United Nations Framework Convention on Climate Change Secretariat (UN Climate Change)
Intergovernmental Panel on Climate Change
UN Environment Programme- Climate Change
Columbia Law School’s Sabin Center for Climate Change Law is a wonderful resource for all aspects of climate change law. In the international law field, the Center’s website includes the 2017 report it wrote for the UN Environmental Programme: “The Status of Climate Change Litigation: A Global Review.”
Here are five online research guides about international climate change or international environmental law generally that may be useful: