"[Brown's] ability to make a complicated subject accessible to the general reader is remarkable." —Katherine Salant, Washington Post "Lester Brown is one of the pioneers and heroes of global environmentalism. If the 2007 Nobel Peace Prize had been extended to a third recipient, the logical candidate would have been Lester Brown." —E. O. Wilson 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.