This document discusses global energy needs and consumption. It notes that there are 5 major needs for energy: heating, lighting, power, raw materials, and electricity. Approximately 2 billion people worldwide lack access to modern energy. Energy consumption varies significantly between countries, with Americans using 8 times the energy per capita as Chinese. Transportation accounts for about 30% of final energy usage, with 80% from hydrocarbon fuels. The future of energy will depend on scenarios for 2020, 2050, and 2100.