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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Dear Kevin<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I am not repeating your many comments. They were all useful. Thanks. The places where dung will be used as fuel is where they are in use already. In other words it is not worth at this early stage planning on cleaning the fuel too much unless it assist combustion. We can work in stages: continued gathering of scattered data, working on anything that burns better, then tuning the fuel and the stove to produce a combination that is acceptable.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-CA'>What should happen is that the present system is evaluated for emissions as a baseline and the stove checked to make sure they ‘cause no harm’ beyond what is there now. Something we expect is that the flame temperature will be higher as the gases are burned more efficiently in lower excess air. If the chemistry suggests that dioxins will be higher (or high enough to be a concern for the local environment) then it needs to be quantified and limited.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-CA'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-CA'>Crispin<o:p></o:p></span></p></div></body></html>