Expo 2015 has certainly brought to the international attention different aspects related to the safeguard of food resources. Among various issues, food waste is particularly important from many points of view. For years several countries have carried out initiatives aimed at reducing food waste, both for ethical reasons linked to a disparity in food distribution between different areas of the planet, and for environmental reasons, as food waste is one significant cause of CO2 emissions.  As of today though, despite more accurate studies and research that describe the problem, significant results are yet to be seen, as final consumers have not become an active part in this system.  From a practical point of view, zero food waste is not an easily reachable target in the...