“When you grow up in a developing country like India, as I did, you instantly learn to get more value from limited resources and find creative ways to reuse what you already have. Take Mansukh Prajapati, a potter in India. He has created a fridge made entirely of clay that consumes no electricity. He can keep fruits and vegetables fresh for many days. That’s a cool invention, literally.

In Africa, if you run out of your cell phone battery, don’t panic. You will find some resourceful entrepreneurs who can recharge your cell phone using bicycles. And since we are in South America, let’s go to Lima in Peru, a region with high humidity that receives only one inch of rainfall each year. An engineering college in Lima designed a giant advertising billboard that absorbs air humidity and converts it into purified water, generating over 90 liters of water every day. The Peruvians are amazing. They can literally create water out of thin air.” — Navi Radjou