10 Questions for Thomas Friedman

The columnist's new book, Hot, Flat, and Crowded , is out Sept. 8. Thomas Friedman will now take your questions

Jay Clendenin / Aurora

Thomas Friedman

What moved you to write Hot, Flat, and Crowded? Louland Escabusa MAKATI CITY, PHILIPPINES

I spent two years doing documentaries for the Discovery Channel on energy and the environment, and it was really after that I realized something big had happened. The "flat" in Hot, Flat, and Crowded is my shorthand for the rise of middle classes all over the world. If this many people are able to live like Americans, the energy and environment implications will be explosive.

Which technologies do you think will emerge as primary drivers of renewable energy? Bryan Massie FORT WORTH, TEXAS

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