"Carbon sequestration via wood burial"

Here.

The paper estimates that this would cost about 250 billion dollars annually, which it says is "only" about 0.5% of 2006 world GDP. Two million workers would be required.

For starters, here are three quick questions:

1. If implemented on a massive scale, what's the projected delta in global temperature?

2. Even if your calculated answer to (1) is correct, how do we know that the resultant temperature is "better" than the temperature resulting from not doing any wood burial?

3. Would you recommend doing this anywhere within the range of the Spotted Owl or the North American Lynx?

Also, if we employed two million people full-time burying wood around the world, would this affect the price of lumber?