The primary source of carbon emissions from human activities is the burning of fossil fuels, which includes coal, oil, and natural gas. These fuels are used for energy production, transportation, and industrial processes, releasing significant amounts of carbon dioxide (\CO2) and other greenhouse gases into the atmosphere. Deforestation for agriculture and urban development also contributes to emissions, as trees that absorb carbon are removed. Tackling this issue requires transitioning to renewable energy, enhancing energy efficiency, and promoting sustainable land-use practices to mitigate climate change and its associated impacts.