Take the problem, often a lack of something or a negative form of it, and turn it positive: just feed those who starve, just get the homeless homes, just get the unemployed work, just educate the uneducated, just stop wars (become neutral).
I almost had “Food waste is the world’s dumbest problem” as the title.
Food is food, after all. Food is organic. Organic stuff rots quicker than other things. My dacha has a compost pile where uneaten food and banana peels go. There is nothing wrong with this, as well as with throwing apple seeds out the window (as long as there’s soil below).
School forced us to eat the barely decent meal entirely, instead of letting us get as much as we feel like and having the option to bring own food. This applied even if paying the school lunch provider!
They say food waste is a problem because people don’t finish the food they’re eating, while kids in Africa suffer from hunger. How is overfilling yourself, thus making yourself feel worse, helping kids in Africa? Take as much as you can eat! Unfortunately this is not so much of an option in restaurants, hence stop feeling guilty about not finishing your meal.
It is also noteworthy to mention Apeel, a company that has developed a way to keep food fresh for longer — by using leftovers from other food to keep moisture in and oxygen out.