NASA Administrator Charles Bolden said Hampton Roads could become a leader in the emerging field of green aviation. By making the region a hub where government, academia and industry develop ways to make aircraft more fuel efficient and less noisy, and improve air traffic control could bring billions of dollars of investment to the region. Bolden said: “It is a possibility, but we’re not there yet.” He said more work needs to be done before — and if — Hampton Roads becomes a green aviation hub. The field is poised to grow because airlines are struggling to control costs and ensure that customers arrive on time to their destination. NASA is working the Federal Aviation Administration and other groups to create a more efficient air traffic control system, Bolden said. The Hampton-based NASA Aeronautic Support Team, which is working with Warner, previously said a plan to make Hampton Roads as green aviation hub could be submitted to Congress as part of Obama’s 2013 fiscal budget.