Environmental groups are urging U.S. airlines and airports to recycle more of the 7.5 million pounds of trash created by travelers daily. The environmental advocacy group Natural Resources Defense Council estimates that 75% of that trash is recyclable, but only 20% reaches a recycling center. Recycling programs vary from airport to airport, with efforts to include separating materials from the trash to providing liquids disposal at security checkpoints. "The issue is very local," notes Nancy Young, vice president of environmental affairs for the Air Transport Association. Many airlines have programs in place to recycle not only consumer waste, but also oil and other maintenance products.