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Jesse McKeown added some important basic information about photosynthesis to the page on Carbon negative energy. I tried to incorporate his idea into a clearer discussion of biofuels versus biochar. However, this article is still very much a stub... we need detailed figures about the carbon footprint of biofuels versus biochar — or at the very least, links to such figures.
Having addressed Jesse's point to some extent, I deleted his query box. Please don't take that as some sort of attack, Jesse! These query boxes should come and go quite rapidly; there's probably something new that's questionable about this article, requiring some new query boxes, but the comment you'd written would look a bit mysterious now.
Also, Jesse: to get your name to look nice on the Azimuth Project, you alas need to put a backslash before "McKeown", because that word is a "camel case" word — read the stuff that's visible at the bottom right when editing any Azimuth Project page. I'm sorry about this: I don't really like that "feature" of Instiki; it's never done anything but cause me trouble.
I see there's already a thread here about "mixed case surnames".