It feels like any question is answerable online. But for small-scale farmers around the world, it's not that simple.

Take the story of Kenyan chicken farmer, Kepha. "There was a disease that was ripping through his flock," says Kenny Ewan, CEO of agricultural startup WeFarm. "He had something like 52 chickens that he kept and half of them had died within the space of a few days."

Kepha's entire livelihood depended on those chickens. And if he couldn't figure out a fix quickly, they were all going to die. "That paid for his kids to go to school," adds Ewan. "To put food on his table."

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Gates Foundation: The Story of Food

Can you imagine trying to feed 9 billion people?

I mean, it's hard enough to feed ourselves some days.

But come 2050, Earth will be responsible for feeding an additional 2 billion people roaming the planet. The question is: how to do that?

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Gates Foundation: The Story of Food

When I was a kid, I went on a lot of nature walks with my mom.

We lived in the country in Central Texas and had a little plot of woods all to ourselves. We walked around big, ancient oaks and twisted, gnarly mesquite trees. Sometimes, we'd find a tree covered in big, ropey mustang grapevines and I'd climb up into the trees, pretending I was in the Swiss Family Robinson.

Other times, we went looking for animals. My favorites were the green anole lizards that lived on trees and flashed their red neck flaps at you.

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