The annual Carbon Outlooks released by the EU-funded 4C project provide an overview of the evolution of the CO₂ emissions during the past year, prepared in collaboration with the Global Carbon Project.

The 4C Carbon Outlook, released in November 2021, is warning that stronger climate policies are needed to trigger the necessary short-term action to reduce CO₂  emissions sufficiently in the coming decade to keep the option for 1.5°C alive.