The primary causes of global warming are linked to human activities that increase the concentration of greenhouse gases in the atmosphere. The burning of fossil fuels for energy and transportation is the largest contributor, releasing significant amounts of carbon dioxide. Deforestation also plays a critical role, as trees absorb carbon dioxide; when they are cut down, not only is this carbon storage lost, but the act of burning or decomposing trees releases additional CO2. Other contributors include agricultural practices, which emit methane from livestock and rice paddies, and industrial processes that release various greenhouse gases. Together, these activities disrupt the natural balance of greenhouse gases, leading to an enhanced greenhouse effect and subsequent warming of the planet.