The gas most commonly associated with global warming is carbon dioxide (CO2). It is a greenhouse gas that traps heat in the Earth's atmosphere, contributing to the greenhouse effect. Human activities, particularly the burning of fossil fuels, deforestation, and industrial processes, have led to significant increases in CO2 concentrations since the Industrial Revolution. The rising levels of carbon dioxide in the atmosphere are a primary driver of climate change, causing global temperatures to rise and impacting weather patterns, ecosystems, and sea levels. Mitigating CO2 emissions is critical in addressing climate change and its effects.