Rising carbon dioxide (CO2) emissions from human activities are the largest contributor to global warming. According to the International Energy Agency (IEA), global CO2 emissions reached an all-time high of 37.8 gigatons in 2024. While some of this CO2 is absorbed by soil, forests, and the oceans, a large fraction remains in the atmosphere, where it can persist for hundreds to thousands of years, leading to long-term impacts on the global climate.