A further acceleration of clean energy is needed for global CO2 emissions to peak and decline

Global fossil fuel CO2 emissions have grown 0.8% per year on average between 2019 and 2025. Here we project a decrease of 0.4% in 2026, probably as a short-term response to the energy shock triggered by the Iran conflict. Electric vehicles and solar and wind power offset about 64–79% of increasing emissions from demand growth through 2028; acceleration in clean technology deployment is needed to guarantee emissions peak and subsequent decline.