Honestly I was not even aware of that ... A quick search shows that a 100 yo birch tree stores only about 15 kg CO² ... So your half a tree seems to be in the r

Honestly I was not even aware of that ... A quick search shows that a 100 yo birch tree stores only about 15 kg CO² ... So your half a tree seems to be in the right ball park. Also ... CO² is bad ... but at least is non-toxic compared to some of the other side products.