Charles Massy gained a Bachelor of Science in the 70s before returning to the family farm near Cooma and the Snowy Mountains. He has been farming since, and in 2009 Charles Massy returned to ANU to complete a PhD in Human Ecology. In his latest book Call of the Reed Warbler he explores regenerative agriculture; an approach to farming that rebuilds topsoil, increases biodiversity, and importantly for Australia, resurrects eroded land and combats climate change. Charles joins us in the studio. Here's Sarah's review of the book.