Mangoes are the national fruit of India, but as many as half of the mangoes that are harvested in Krishnagiri district each year spoil before they even leave the farm. It’s part of a big problem that the world faces when it comes to its food supply.

Globally, more than half-a-trillion dollars’ worth of fresh fruit, vegetables and grains goes bad before it’s sold each year, according to consulting firm McKinsey.