The Paris Agreement, adopted in 2015, brings together 195 nations to limit global temperature rise to well below 2 degrees C and pursue efforts to stay within 1.5 degrees C. It also strengthens countries’ ability to adapt to climate impacts and provides enhanced support to assist developing nations in addressing climate challenges. Between 2014 and 2019, WRI conducted research to support the design and adoption of the Paris Agreement and to inform the development of the rules underpinning its operation. WRI continues to work in this space, encouraging countries to enhance nationally determined contribution (NDC) ambition and better design and adopt long-term strategies (LTS), while amplifying the voices of developing and climate-vulnerable countries within UN negotiations. Foundational resources from earlier projects remain available here alongside this ongoing work.