Friedman's new bestseller on the need for a "Green Revolution."

Pulitzer-prize winning New York Times columnist Thomas L. Friedman has a new book out about the global energy challenge, titled 'Hot, Flat, and Crowded: Why We Need a Green Revolution - and How It Can Renew America.' The book has already shot to the top of Amazon's bestsellers list.

In the book Friedman argues that global warming, population growth, and new wealth in emerging economies has created an urgent need for changes to the way we use and produce energy. He calls it "Code Green."

It's now up to the United States to take the lead in a worldwide effort to replace wasteful, inefficient energy practices with a strategy for clean energy, energy efficiency, and conservation, he writes.

- David Adams