In these early days of the Biden Administration, it has become clear that climate diplomacy is returning to the U.S. foreign policy agenda. On Inauguration Day, the new Administration announced that the United States would rejoin the Paris Agreement, signaling an abrupt shift from the previous administration’s approach toward multilateral environmental agreements. Signed in 2015, the Paris Agreement made history as the first legally binding agreement to oblige states to limit global warming to well-below 2°C by the end of the century. Limiting warming to this threshold would help prevent irreversible damage to our climate system and planetary boundaries, as demonstrated by the Intergovernmental Panel on Climate Change. To accomplish this ambitious feat, signatories of the agreement are asked to submit Nationally Determined Contributions (NDCs) every five years to communicate how countries will reduce their emissions and build resilience to adapt to a warming world.