The super-nutritious cereal Bill Gates added to his diet that can help combat hunger and climate change.

Versatile, healthy, and easy to cook, this ancient grain of African origin could be the next culinary boom. According to Bill Gates, it can also help save the planet. Although virtually unknown outside of Africa, this ancient grain could have a great global future. It's small, golden, has more calcium than wheat, and is drought-resistant. It has been known in West Africa for over 5,000 years. But outside that region, very few had heard of fonio.…