Hi Ken, David:
This is a really nice article! However, I take issue with a couple of
statements on biological methods:
1. You said biological systems are relatively inefficient in their
ability to capture CO2. It is estimated that it would take
approximately 2.5 acres of crop land to remove the
Prof. Zeng and list:
1. I concur with your objections. But I have another - which is that neither
the present article or your own recent discussions on this list use the word
Biochar - which I think has great promise, and certainly has received as much
public notice as any of the other
