Question

What you can to persuade them not to waste food

Answer 1

Some of your friend order more food than they can eat when they go out to eat at a restaurant often then food is wasted what you can do to persuade them not to wasted
food 

Answer 2

make them realise that there are 183 billion people dying due to starvation.For them food is so neccessary and thus we should not waste food carelessly.it is a fact that 30% of food produced in world is left unconsumed or is wasted by people like us.and only if one-fourth of the total food which is wasted is saved no one on this earth will be hungary