'It's a groundswell': the farmers fighting to save the Earth's soil

Farmers across the world are ditching their ploughs to protect ecosystems - and it's working

John Cherry bends down and takes a handful of soil in his hands, brings it up to his face and breathes deeply.

"You can smell when it is good," he says, poking it with a finger. "This smells of roots " there is a rich, organic quality to it. It is a good smell."