According to researchers, each airline passenger produces about three pounds of trash per flight, from disposable headphones and plastic cutlery to food scraps and toilet waste. To increase mindfulness about the trash, British design firm PriestmanGoode has refashioned the economy meal tray, replacing plastic with renewable materials such as coffee grounds, banana leaves and coconut wood. Associate Strategy Director Jo Rowan says, “Onboard waste is a big issue. Knowing that you have 4 billion passengers per year, it all adds up very quickly.” The redesigned items are featured in an exhibit, “Get Onboard: Reduce.Reuse.Rethink.” at the Design Museum, in London.