From the podcast People Fixing the World here is a podcast about biochar. It was posted on November 2, 2021. The abstract: “sixteen percent of greenhouse gas emissions could be saved by using biochar, a simple fertilizing technique adopted by tribes in the Amazon thousands of years ago. If produced on an industrial scale, scientists say biochar could be as powerful as renewable energy in the fight against climate change.” The podcast is available here on our site and here for one year on BBC.
