Air Pollution - © Paul Louis Archer
This is a multiple exposure photograph, which means that you take two photos on one single frame i.e. in reality, this is not two planes, but two shots of the same plane.
I hope the title and image conveys the idea of flight build-up perils and air pollution. Before you ask, I'm not afraid of flying ;) I will be happily boarding a plane soon. What an eco hippocrate, I hear you say!