<div dir="ltr">Andrew:<br><br>Even taking the Wikipedia definition you offer - <span style="font-size:12.8px">"Pollution is the introduction of contaminants into the natural environment that cause adverse change" - one has to show that CO2 causes adverse change (net change to what, when, how) before reaching your conclusion that "</span><span style="color:rgb(80,0,80)">CO2 is a pollutant when it enters the atmosphere from any process."<br></span><span style="font-size:12.8px"><br>Since anthropogenic CO2 is usually co-emitted with other species, as part of a process (fuel combustion or landuse change), all effects of that process have to be valued and summed in order to determine if the process led to a net adverse change.<br><br>So far, the only significant example I have found is inefficient, uncontrolled combustion of low-quality biomass. <br><br>Nikhil<br></span><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><font face="georgia, serif">------------------------------------------------------------------------<br>Nikhil Desai</font></div><div><font face="georgia, serif">(India +91) 909 995 2080<br><i>Skype: nikhildesai888</i><br></font><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Sun, Apr 9, 2017 at 11:36 PM, Nikhil Desai <span dir="ltr"><<a href="mailto:pienergy2008@gmail.com" target="_blank">pienergy2008@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Andrew:<br><br>For individual health, it is the exposure profile that matters, not emission rates and concentrations.<br><br>My smoking a cigarette on a vacant beach in Vanuatu may be pollution, but the CO2 from those breaths - or even CO and PAHs - hurt nobody.<div><br></div><div>To call CO2 emissions as pollution means all terrestrial air is polluted. Even if consistent with a definition, this has the lawyerly attribute - precise, but irrelevant.<span class="gmail-HOEnZb"><font color="#888888"><br><br>Nikhil<br></font></span><br>PS: I have the same view of WBT lab test results - precise but irrelevant. :-)</div><div><br></div><div><br></div></div><div class="gmail_extra"><span class="gmail-"><br clear="all"><div><div class="gmail-m_-6475867229834100391gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><font face="georgia, serif">------------------------------<wbr>------------------------------<wbr>------------<br>Nikhil Desai</font></div><div><font face="georgia, serif">(India <a href="tel:+91%2090999%2052080" value="+919099952080" target="_blank">+91) 909 995 2080</a><br><i>Skype: nikhildesai888</i><br></font><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
<br></span><div class="gmail_quote"><div><div class="gmail-h5">On Sun, Apr 9, 2017 at 11:11 PM, Andrew Heggie <span dir="ltr"><<a href="mailto:aj.heggie@gmail.com" target="_blank">aj.heggie@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail-h5"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span>On 6 April 2017 at 17:53, Crispin Pemberton-Pigott <span dir="ltr"><<a href="mailto:crispinpigott@outlook.com" target="_blank">crispinpigott@outlook.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> If CO2 is now 'pollution' and not the result of perfect biomass combustion <div><div class="gmail-m_-6475867229834100391m_971109585664155465gmail-h5"><div dir="ltr"><div class="gmail_quote"><div><div><div style="width:100%;max-width:650px"><div style="font-family:arial"><br>
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</div></div></div></div></blockquote></span><div> Crispin<br><br></div><div>Wikipedia says:<br><br>"Pollution is the introduction of contaminants into the natural environment that cause adverse change"<br><br></div><div>Which seems a fair enough definition to me, so just a weed is a plant growing in the wrong place, even though a result of natural seeding so CO2 is a pollutant when it enters the atmosphere from any process.<br><br></div><div>You can argue about the scale of the effects but not for this list please.<span class="gmail-m_-6475867229834100391HOEnZb"><font color="#888888"><br><br></font></span></div><span class="gmail-m_-6475867229834100391HOEnZb"><font color="#888888"><div>Andrew<br></div></font></span></div></div></div>
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