How an Australian biochar start-up inspired Microsoft's negative carbon plan
5 March 2021 In the South Australian town of Tantanoola, just down the road from the Lake Bonney wind farm, a small herb-growing company called Holla Fresh is conducting a cutting edge experiment in carbon sequestration and off-grid energy generation. Every so often a truckload of woodchips arrives at the property, where they are taken into a shed, fed into an air-tight pipe, heated, and turned into charcoal. The syngas created in the process is used to power the business, while the charcoal – or high-carbon “biochar” – is turned into compost. Believe it or not, this obscure, small-sc...