Global CO2 emissions rose slightly in 2025 as solar power offset growth in advanced economies.

International Energy Agency data shows global CO2 emissions rose 0.4% in 2025, driven by increased U.S. electricity demand from data centers and a resurgence in coal use due to high gas prices. However, solar power surpassed all other sources to become the top energy growth contributor for the first time, helping offset emissions in advanced economies while China and India saw declines.