Probably, honestly if you get firewood in CO, chances are it's beetlekill. I have an arrangement with a local sawmill that only works with beetlekill. I get to sort around through the scraps and take what I want. There's literally mountains of wood. I heat my house using same.
Here's how I make the biochar, if you wanna make it yourself it's real simple. I make a raging fire in wood stove, then add a couple fresh logs, then completely shut damper. Leave overnight then next day remove logs, place in Rubbermaid tub, smash with baseball bat, fill tub with water to rinse, strain, dry and done. Then charge it before use. Easy process for making small amounts of bio char for the DIY'r.
Here's how I make the biochar, if you wanna make it yourself it's real simple. I make a raging fire in wood stove, then add a couple fresh logs, then completely shut damper. Leave overnight then next day remove logs, place in Rubbermaid tub, smash with baseball bat, fill tub with water to rinse, strain, dry and done. Then charge it before use. Easy process for making small amounts of bio char for the DIY'r.