A plan to expand O'Hare International Airport has begun to look more promising, but supporters of a proposed airport near Peotone said last week they don't expect it The plan changes the debate about a third airport. "It still won't increase air capacity and it won't solve their long-range problem," said Don Goff, president of the Third Airport Alliance. “I don't see it as a setback,” he said of the plan to build more terminals and gates. Goff said that even if supporters of the O'Hare expansion later use the World Gateway project to justify building more runways, a third airport will still be needed. " said Goff. But those who hope that plans for an airport near rural Peotone will be canceled see the project as a sign of hope. "I'm very happy about this," said Jill Holzaepfel of Peotone, who has said he hopes the planes and traffic stay close to the city. "I choose to live here, on farmland," he said, adding that those affected by more noise and pollution in an expanding O'Hare have chosen to live near the airport. Some Peotone opponents propose expanding the to Gary, Indiana, or building another site Major airlines serving O'Hare International Airport and city officials have reached a tentative agreement to proceed with a $3.2 billion renovation at the world's second busiest airport, a city spokesman said Mayor Richard Daley called the project the "World Gateway Program." Major airlines serving O'Hare: United Airlines and American Airlines. “We have an agreement in principle right now,” Monique Bond, a spokeswoman for the Chicago Department of Aviation, said Friday evening. “We are confident that we are moving forward and we are quite optimistic about the finality of the agreement.” The renovation, which will take eight years to complete, is expected to increase the number of boarding gates by at least 25%. It also intends to increase the number of flights and make connections in and out of the airport easier. “This is basically what we're doing to better utilize the existing facility with greater efficiency,” Bond said. He said the redesign will help accommodate airlines' growing use of larger planes, such as the Boeing 777. While Bond did not confirm the number of new gates involved, a report in next week's Crain's Chicago Business cites sources close to the negotiations say