Wow cool, at first I said "but the CO2 gets released when the building burns down", so I looked into it. Apparently wood has a ton of benefits, basically it doesn't release much of the CO2 if it just sits there (http://www.awc.org/pdf/education/gb/ReThinkMag-GB500A-Evalua...). And it takes far less energy to grow a tree than the respective amount of concrete/other building materials (http://www.treehugger.com/green-architecture/new-study-confi...). So wood->building materials is a great option. Right on!