Forty percent of the food in India was thrown away.
What is the most scary that individuals throw away (with any luck something is going to be compost) the most beautiful parts of the plants even before eating the rest of it.
You cannot eat the skin of an onion, but inside it contains concentration of guercetin, antioxidant that helps reducing blood pressure, avoiding arteriosclerosis etc. Using the onion skin in the next meal you prepare will make your plate richer with this and some other nutrients.
This vegetable is very healthy and have antibacterial goods, that is known as regulator of blood sugar, killing the cancer cells, stopping nosebleeds, and provide our immune system with sufficiently of vitamin C.