Well, for those of you geoengineering hacks who are keen on biochar, this week provided no lack of entertainment!   Quite an uproar took place in UK based newspaper the Guardian.  George Monbiot took aim at biochar   and its promise to sequester carbon dioxide in the atmosphere.  No holds barred either:

"Sorry, not charcoal. We don't call it that any more. Now we say biochar. The idea is that wood and crop wastes are cooked to release the volatile components (which can be used as fuel), then the residue - the charcoal - is buried in the soil. According to the magical thinkers who promote it, the new miracle stops climate breakdown, replaces gas and petroleum, improves the fertility of the soil, reduces deforestation, cuts labour, creates employment, prevents respiratory disease and ensures that when you drop your toast it always lands butter side up. (I invented the last one, but give them time)."

Toast landing butter side up?  If only!  He went on to pick, poke, and prod biochar for a few more paragraphs, and implicated a few heavyweight proponents...
(read the rest on Celsias.com)