The next generation of airplanes has arrived. They have bigger seats. Their windows are larger. They have more space for luggage. And they are coming to an airport near you. These new airplanes, such as the Boieng 787 Dreamliner or Bombardier CSeries, and more comfortable for passengers. They also benefit the environment. By using less fuel, they will create less pollution. Airline companies are excited, but scientists wonder if the airplanes' designers could do even more.