This November, the UN-commissioned Conference of the Parties, or COP, will be meeting for the 26th time.

Since the 1990s, over 190 countries have met for the COP to negotiate and solve the climate crisis. Previous meetings have led to the Paris climate agreement–the international effort to limit global warming to well below 2 degrees Celsius compared with pre-industrial levels.

At the COP26 meeting, countries are expected to further commit to their initial pledges made in 2016. To do this, countries are committing to Nationally Determined Contributions to achieve the Paris goals. China, Japan, South Korea, and other major emitters are expected to make official NDCs at the COP26 meeting.

Ahead of the COP26 meeting, US President Joseph Biden has pledged that the US, which is the biggest carbon polluter in history, will reduce its greenhouse gas emissions 50%-52% from 2005 levels by 2030. In addition, Biden pledged that the US would reach zero emissions by 2050.