About midway into the article is information related at the North American Biochar Conference.

"Some of us are not ready to give up on prevention quite yet. I recently attended the North American Biochar Conference to learn more about the possibility for lowering temperature by reversing the carbon flow from the soil to the atmosphere."

Terran

My brother has a wood fired boiler for heating his house. The boiler is set up for short hot burns. After the blower shuts off, he seals off the oxygen to fire box. The next morning he almost always has charcoal. We've been mixing many garbage can loads into his garden, compost pile, and potting mix.
Can't say I've seen any difference, but it can't hurt.

Eric