[gus_massa]

One idea is to charcoal the wood, it makes it harder to decompose and is similar to pure carbon. I'm not sure if it's better to send it to the bottom of the ocean or just to a big hole on land.

[dheera]

The big hole on land could be dangerous if a fire ever gets there. I suppose, maybe a big hole in the middle of northern Canada might be fine

[gus_massa]

Yep https://en.wikipedia.org/wiki/Centralia_mine_fire