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The Modern Scholar series offers you college-level courses taught by the world's most respected professors. As these expert teachers guide you through the course material, you become more knowledgeable and better versed in the subject. Learning has never been easier or more enjoyable!

As fossil fuel prices rise, oil insecurity deepens, and concerns about climate change cast a shadow over the future of coal, a new energy economy is emerging. Wind, solar, and geothermal energy are replacing oil, coal, and natural gas, at a pace and on a scale we could not have imagined even a year ago. For the first time since the Industrial Revolution, we have begun investing in energy sources that can last forever. Plan B 4.0 explores both the nature of this transition to a new energy economy and how it will affect our daily lives.