Renowned professor Michael B. McElroy leads a comprehensive examination of energy, including its history, use in the world today, and environmental consequences. Whether discussing the 'oil shocks' of the 1970s, the current reliance on imported oil, or the growing buildup of carbon dioxide in the planet's atmosphere, it is clear that energy represents one of the world's most daunting challenges. In these informed, easy-to-follow lectures, Professor McElroy imparts a clear understanding of energy-in all its applications-and offers a vision for a clean, safe, and sustainable future.