What is the biggest cause of carbon footprint?

The biggest cause of carbon footprint is the burning of fossil fuels for energy production, transportation, and industrial processes. This includes emissions from vehicles, power plants, and factories, which release significant amounts of carbon dioxide and other greenhouse gases into the atmosphere. Deforestation and agricultural practices also contribute notably, but fossil fuel combustion remains the leading factor in global carbon emissions. Reducing reliance on these sources is crucial for mitigating climate change.