<div>Dear Mr. Helferty,</div>
<div>the idea of using a charcoal making stove for cooking and putting the resultant charcoal into the soil is an idea that has been suggested years ago by Ron Larson. Secondly, it is not true that most of the carbon in the fuel is retained in the charcoal. It is likely that you were just quoting Zaelke, but the pyrolysis gas, that is burned in these stoves also contains carbon. My estimate is that charcoal retains about half of the original carbon in the fuel.</div>
<div>Yours</div>
<div>A.D.Karve <br><br></div>
<div class="gmail_quote">On Wed, Nov 17, 2010 at 10:46 PM, Lloyd Helferty <span dir="ltr"><<a href="mailto:lhelferty@sympatico.ca">lhelferty@sympatico.ca</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote"><a href="http://www.guardian.co.uk/environment/blog/2010/oct/21/barbecues-climate-change" target="_blank">http://www.guardian.co.uk/environment/blog/2010/oct/21/barbecues-climate-change</a><br>
October 21, 2010<br><br>Durwood Zaelke's emergency plan for tackling climate change ranges from the Montreal protocol to carbon-negative barbecues<br><br>Barbecues that remove CO2 from the air could play a role in the fight against climate change according to Durwood Zaelke, a leading expert on rapid responses to global warming.<br>
<br>This year's outdoor cooking season might be over, but Zaelke suggested at last week's 10:10 talk that from next summer consumers should start demanding barbecues that do their bit for the planet by generating rather than consuming charcoal – or biochar.<br>
<br>Zaelke's idea is based on a stove designed for use in the developing world by Rob Flanagan. The stove creates heat by turning wood or other biomass into charcoal, a process that releases combustible gases.<br><br>
Once the cooking is over, most of the carbon from the fuel remains in the stove in the form of charcoal. This can then be mixed in with soil, a process that sequesters the carbon for thousands of years and boosts crop productivity.<br>
<br>... But whatever we do with non-CO2 gases, Zaelke says, we also urgently need not just to reduce carbon dioxide, but to get to a point as soon as possible where the world becomes carbon negative, with humans sequestering more CO2 than we release. "That might sound crazy," he says, "but we could do it".<br>
<br>The biochar barbecue idea is, I guess, really just a way for Zaelke to remind us that there are various techniques – on big and small scales – that we could use to suck CO2 out of the air.<br><br>-- <br><br> Lloyd Helferty, Engineering Technologist<br>
Principal, Biochar Consulting (Canada)<br> <a href="http://www.biochar-consulting.ca/" target="_blank">www.biochar-consulting.ca</a><br> 603-48 Suncrest Blvd, Thornhill, ON, Canada<br> 905-707-8754; 647-886-8754 (cell)<br>
Skype: lloyd.helferty<br> Steering Committee member, Canadian Biochar Initiative<br> President, Co-founder& CBI Liaison, Biochar-Ontario<br> Advisory Committee Member, IBI<br> <a href="http://www.linkedin.com/groups?gid=1404717" target="_blank">http://www.linkedin.com/groups?gid=1404717</a><br>
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<a href="http://www.biochar.ca/" target="_blank">www.biochar.ca</a><br><br>Biochar Offsets Group: <a href="http://www.linkedin.com/groups?home=&gid=2446475" target="_blank">http://www.linkedin.com/groups?home=&gid=2446475</a><br>
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</blockquote></div><br><br clear="all"><br>-- <br>***<br>Dr. A.D. Karve<br>President, Appropriate Rural Technology Institute (ARTI)<br><br>*Please change my email address in your records to: <a href="mailto:adkarve@gmail.com">adkarve@gmail.com</a> *<br>
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