Global Carbon Project

Built World

Published the 2026 Global Carbon Budget

Global fossil fuel emissions are projected to fall 0.4% in 2026, to 38.2 billion tonnes of carbon dioxide, the Global Carbon Project said on November 10. The group released the estimate at United Nations climate talks in Antalya, Turkey.

Updated Yesterday

New Capabilities

As of May 2026: Publisher of annual Global Carbon Budget

For decades, scientists assumed forests and soils absorbed roughly 30% of humanity's carbon dioxide emissions. A major reassessment published in Nature in January 2026 shows they've been overestimating: the natural land carbon sink is 20% smaller than previously calculated. That's 0.6 billion tonnes of carbon per year staying in the atmosphere instead of being absorbed.

Updated May 27

Rule Changes

As of May 2026: Warning US withdrawal undermines global climate efforts

On January 7, 2026, Trump signed a memorandum directing US withdrawal from the UN Framework Convention on Climate Change—the 1992 treaty George H.W. Bush signed and the Senate unanimously ratified. The US is the first of 198 parties to exit. The UNFCCC underpins all international climate negotiations (unlike the Paris Agreement, which Trump also exited), and withdrawal takes effect one year from notification.

Updated May 19