Jimmy travels to Australia, where he visits the wheat belt of Western Australia to see if farmers can overcome the global problem of soil salinity.

Jimmy visits the USA, the greatest food-producing country on earth. The farmers have put their faith in new technology to increase food output, but is it enough? In search of answers he visits the tomato fields and bioscience labs of California, a high-output pig farm in Iowa, and gets a taste of the Wild West while herding buffalo in South Dakota. Yet it's a farm in North Carolina that offers the most surprising approach of all.

Jimmy visits Kenya, a country that struggles to feed its own population. Jimmy meets farmers near Lake Victoria who use ingenious new ways to combat pests, and scientists who produce bananas in the lab. As he travels across the country, Jimmy picks roses, milks camels and discovers Masai sheep could save farmers around the world billions of pounds.