Georgetown, Texas, has the least expensive utilities in central Texas for a reason. Next year it'll generate all its power from solar and wind.

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Meet the Texas town going to 100 percent green energy.

"It's sort of like Mayberry R.F.D. Everybody knows everybody," Mayor Dale Ross said.

We're in Georgetown, Texas, which has a small-town feel and a cutting-edge power grid. Next year, it'll be the largest city in America to go 100 percent renewable. And that's in the middle of oil country.

"This is a very conservative community and a conservative county," City Utilities Manager Jim Briggs said. "We were accused of being some Al Gore clones."

"We put to the side national politics whether you're a Democrat, Republican or liberal or conservative," Ross said. "This was a decision that was good for the city."

Clean energy will mean lower utility costs for Georgetown and its 60,000 residents. And it will keep utility costs steady for 25 years.

"We have 97 windmills out in Amarillo," Ross said. "And our solar farm is being built. The energy will be generated there. For both water and electricity, we're the least expensive in central Texas."

"It makes economic sense, and if you share that information and show people where economics work on this, they understand that," Briggs said.

"We've been in a sustained drought in central Texas," Ross said. "It takes considerably less water to generate wind and solar energy. Don't we have an obligation both morally and ethically to leave the Earth better than we found it?"