On the weekend of December 12 and 13, 2015, something monumental happened—representatives of 195 nations adopted a climate agreement in Paris at COP 21. For the first time in history, nearly every country on the planet is committed to working to limit dangerous greenhouse emissions to combat the worst impacts of climate change. More specifically, these nations have agreed to pursue efforts to slow the increase in global temperatures to 1.5 Celcius degrees above pre-industrial levels. Among the legally binding elements of the agreement are the requirements to submit emission reduction targets and regularly review those goals.