Pia Jensen wrote:I just came across this Beware the Biochar Initiative and am fascinated ... more views on biochar among permies here?
Scaremongering using semi-plausible concerns blown out of proportion. The author of that article is treating proposals for making and using biochar as if forests were going to be cleared on a global scale to make char. This, as far as I am aware, has never been proposed! Biochar is instead best made using bi-products from other industries - agriculture, forestry, gardening and landscaping, etc... It could potentially be made using something like a short cycle willow coppice. I once saw a proposal for a system that could be driven out to a work site where teams are clearing brash for fire control that would make both biochar and a refined fuel oil for heating!
Additionally, the numbers do not add up for their concerns about oxygen levels in the atmosphere... If we were to remove ALL carbon from the atmosphere using biochar the concentration of oxygen in the atmosphere might drop by about 1% (ie from 20 ish to 19 ish percent). Equivalent to moving to a slightly higher altitude. And that only holds if the authors assertion that producing biochar reduces atmospheric oxygen concentration, which seems to be unjustified given the strength of the assertions being made.