What human activity contributes the most to greenhouse gas emissions?

Energy production

Energy production, especially from fossil fuels like coal, oil, and natural gas, is the largest contributor to global greenhouse gas emissions. These emissions are primarily due to the combustion of fossil fuels for electricity, heating, and transportation. Transitioning to renewable and clean energy sources, such as solar, wind, and hydroelectric power, is crucial for reducing our dependence on fossil fuels and mitigating the impacts of climate change.