SWEETWATER, Tex.  The wind turbines that recently went up on Louis Brooks’s ranch are twice as high as the Statue of Liberty, with blades that span as wide as the wingspan of a jumbo jet. More important from his point of view, he is paid $500 a month apiece to permit 78 of them on his land, with 76 more on the way.

“That’s just money you’re hearing,” he said as they hummed in a brisk breeze recently.

Texas, once the oil capital of North America, is rapidly turning into the capital of wind power. After breakneck growth the last three years, Texas has reached the point that more than 3 percent of its electricity, enough to supply power to one million homes, comes from wind turbines.

Texans are even turning tapped-out oil fields into wind farms, and no less an oilman than Boone Pickens is getting into alternative energy.

“I have the same feelings about wind,” Mr. Pickens said in an interview, “as I had about the best oil field I ever found.” He is planning to build the biggest wind farm in the world, a $10 billion behemoth that could power a small city by itself.