The agriculture industry is responsible for 20% of all greenhouse gas emissions, second only to energy production. There are a variety of ways agricultural practices produce these emissions. Deforestation for clearing out land to grow more crops leads to carbon dioxide emissions and removes the natural process of removing carbon dioxide from the atmosphere by the trees. Methane is released by organic waste and manure management from livestock. The agriculture industry can reduce deforestation by using existing farmland for crops and raising livestock in tropical areas. They may participate in biofuel production which can help make them more money by utilizing resources already available. It is made from vegetable oil or animal fat and can be used instead of regular diesel fuel. Biofuels reduce sulfur, carbon monoxide, and carbon dioxide emissions, and is also biodegradable.