I've decided to drink the biochar koolaide. I have an EPA wood burning stove that leaves some charcoal in the ash. So I shovel the charcoal and ash into a bucket, let it cool, then screen it. I put the ashes in the garbage and further crush the charcoal with a shovel. So far I've only put it in the compost bins. I doubt I'll get enough to make a substantial difference but it might make the compost smell a little sweeter in the winter months. Heck, I'm saving the planet, improving my compost and garden soil, and warming the house without burning fossil fuels! Not too bad for someone just hanging around the house on a weekend.