The gas known to contribute significantly to global warming is carbon dioxide (CO2). CO2 is a greenhouse gas that traps heat in the Earth's atmosphere, leading to an increase in global temperatures. Its primary sources include fossil fuel combustion, deforestation, and various industrial processes. As human activities have intensified over the years, the concentration of CO2 in the atmosphere has risen, exacerbating climate change and its related impacts, such as extreme weather events and rising sea levels. Efforts to mitigate CO2 emissions are crucial in addressing climate change and promoting environmental sustainability.