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<div name="BB10" id="BB10_response_div_BBPPID" dir="auto" style="width:100%">Dear Julien</div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">We have a few hundred tests from Yogyakarta that include CH4 measurements. In general CH4 tracks CO pretty closely at a fixed fraction (less than 100%). </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">For a biomass stove with decent performance, the CO/CO2 ratio will average under 3%. Methane is perhaps 1/4 or 1/8th of that. Let's go with 1/5th. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">So that has methane at 0.6 of the CO2 emissions on a volumetric basis. Give it a 20 year CO2e of 20 (as discussed previously) it means 12% of the CO2. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">I can't see how this turns into money or benefit for anything. Stoves produce far less methane than another use of biomass. I think it is safe to assume, as CDM does, that all biomass
C ends up as CO2 within a short time (which it does). </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Turning waste biomass into char and burying it (waste that would otherwise have been badly burned) has a net carbon draw down, for while. But the effect is Lilliputian compared
with planting trees in the Sahel. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Regards </div>
<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Crispin </div>
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<div id="from"><b>From:</b> pienergy2008@gmail.com</div>
<div id="sent"><b>Sent:</b> March 5, 2019 9:20 PM</div>
<div id="to"><b>To:</b> stoves@lists.bioenergylists.org; winter.julien@gmail.com</div>
<div id="reply_to"><b>Reply to:</b> ndesai@alum.mit.edu</div>
<div id="cc"><b>Cc:</b> d.michael.shafer@gmail.com; crispinpigott@outlook.com</div>
<div id="subject"><b>Subject:</b> Re: [Stoves] Unexpected Rising Levels of Atmospheric Methane</div>
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<div dir="ltr">Julian: <br>
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Thank you. <br>
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I agree in principle that changes in methane emissions should be recognized by stove testers. <br>
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However, a) methane measurements are inherently questionable even in labs, as Crispin has argued, b) field origins are below any de minimus standard I can imagine worth bothering about. <br>
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Until we get modern stoves accepted by tens of millions of people, I don't think obsessing over methane emission rates from biomass stoves is worth a dime. <br>
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Still, I would very much like to make it worth a dime per kgCO2e avoided - no cost-sharing with Gold Standard, and I will not license them the use of the standard. <br>
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Nikhil<br clear="all">
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<div><font face="georgia, serif">------------------------------------------------------------------------<br>
Nikhil Desai</font></div>
<div><span style="font-family:georgia,serif; font-size:small">(US +1) 202 568 5831</span><font face="georgia, serif"><br>
<i>Skype: nikhildesai888</i><br>
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<div dir="ltr" class="gmail_attr">On Tue, Mar 5, 2019 at 12:19 PM Julien Winter <<a href="mailto:winter.julien@gmail.com">winter.julien@gmail.com</a>> wrote:<br>
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<div dir="ltr">Hi all;
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<div>This week's podcast from the BBC's "Science in Action" talks about unexpected increases in methane, that may be coming from expanding wetlands in the tropics. <a href="https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.bbc.co.uk%2Fprogrammes%2Fp002vsnb&data=02%7C01%7C%7C3b3f9218466d4211755108d6a1da5b5f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636874356531955643&sdata=8SlaqUXPD5hHBVDCZe1UI3lbFV2U8lXIc6j49hjoFFA%3D&reserved=0" originalsrc="https://www.bbc.co.uk/programmes/p002vsnb" shash="qmeBZUK0gBGSouwoVE5weyq6kY66s1GMWcCap1Tp+Y65Xlw7KsNNwWCSfGAb9LwPh43dy4bnAemKCprq/niDNpIbpAp18PjQdZARSeCXX7UiEsZVe02tpYoEGocd8jevNiYuCcx9wY+dgLI2n2V9y9fpgcSpkjoNHnRn60MqRNk=" target="_blank">https://www.bbc.co.uk/programmes/p002vsnb</a>
"Rising Methane Levels Impact Climate Change"</div>
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<div>We need to have methane included as a standard measure of cookstove emissions.</div>
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<div>We should also be looking at the interaction between stoves and different types of fuels on the emissions of NOx</div>
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<div>Cheers,</div>
<div>Julien<br clear="all">
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<div dir="ltr">Julien Winter<br>
Cobourg, ON, CANADA<br>
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