I met a guy who made biochar on the woodlot of someone he had an arrangement with - woodlot owners are always looking for new ways to monetise their lots, you m

I met a guy who made biochar on the woodlot of someone he had an arrangement with - woodlot owners are always looking for new ways to monetise their lots, you may be able to tinker with biochar production/sequestration without the big upfront investment, this guy did it with a few weekends (and free labour from people who wanted to learn the technique) a year.