Which type of energy resources are projected to increase over the next 20 years? How will this impact the environment?

Energy is essential to life. Without it, many billions of people would be left cold and hungry. The major source of energy comes from fossil fuels, and the dominant fossil fuels used today by most industrialized and developing countries are oil, coal, and natural gas. Among these fossil fuels, oil is the most consumed for energy conversion, followed by coal, then natural gas. In 1997, the world produced approximately 130 quadrillion Btu of energy from oil, 80 quadrillion Btu from coal, and 70 quadrillion Btu from natural gas.