Jul. 5--In July of last year, Dallas billionaire T. Boone Pickens began a $60 million advertising campaign and speaking tour designed to persuade Americans to stop using foreign oil.

The oilman-turned-environmentalist proposed a seemingly simple plan: Convert cars, especially big fleets operated by companies and municipalities, from gasoline to domestic natural gas. And start generating more electricity from wind.

By the end of this year, Pickens predicts, Congress will finish passing laws to implement his plan. And within two years, oil imports will drop.

"We have gotten everything we went after," he said. "I have people say it didn't go very fast. Go back and compare it to other things. I think we've moved very fast."

But oil import data don't yet show much direct impact from Pickens' campaign, and a key new natural gas law hasn't made it out of legislative committee. He's persuaded some companies and municipalities to buy natural gas-powered fleets, but the numbers remain tiny.

Still, Pickens' $60 million bought remarkable influence. Because of Pickens, the term "foreign oil" entered the presidential campaigns, executive speeches and everyday discussions.

And he brought many of his conservative followers into the discussion about clean energy through his warning about energy security, allowing them to discuss alternative energy without stepping into the thorny debate about whether humans cause climate change.

"When you have a successful investor from Texas, someone from a state that, some people say, doesn't care about clean energy, to have him come out as the champion, caught a lot of people by surprise and brought a lot of attention to the incumbent [energy companies] in Texas being part of the solution," said Paul Dickerson, a former executive with the U.S. Department of Energy and head of Haynes and Boone's clean technology practice.

Pickens would probably also benefit from his plan. Pickens invests in companies that produce natural gas and sell natural gas vehicle fuel, and a company that builds wind farms.

His retort: "If I'd wanted to make money, I would have kept my $60 million."

On a mission

Instead, Pickens said, he felt he was on a mission that only he could accomplish.

"I felt like it was a mission that you had to tell the American people, you now knew something that affected their lives, their future, their children and grandchildren and everybody else, generations to come. And you had properly analyzed it, you knew what the problem was, and you had a solution for the problem," he said.