Researchers at Clemson University are presenting work at the National Meeting and Exposition of the American Chemical Society that could change how astronauts handle waste in the future. For long trips -- to Mars, for instance -- astronauts will need to maximize the utility of everything they bring on board. Extra weight means more fuel is required, so keeping stocks low while being able to recycle waste into something useful is going to be necessary for these sorts of trips. "If astronauts are going to make journeys that span several years, we'll need to find a way to reuse and recycle everything they bring with them," Mark Blenner, one of the researchers on the project told Phys.org. "Atom economy will become really important."