A cleaner world could start in a rice field | Jim Whitaker and Jessica Whitaker Allen

Rice is the world's largest food source — and it's also a massive emitter of methane gas, a key contributor to climate change. Fifth-generation rice farmer Jim Whitaker and his daughter, farmer and conservationist Jessica Whitaker Allen, are working to slash rice's environmental impacts with innovative, sustainable farming practices. They share how they're keeping their family farm in Arkansas profitable while also spreading green farming practices to their neighbors — and, eventually, the rest of the world. "If you take care of the planet, it will take care of you," says Whitaker Allen.