<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif">All statements below from the website.  First paragraph broken up with some text larger for emphasis<br></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif"><a href="https://www.realclimate.org/index.php/archives/2021/11/net-zero-not-zero/">RealClimate: Net Zero/Not Zero</a><br></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif">At the COP26 gathering last week much of the discussion related to “Net-Zero” goals. This concept derives from important physical science results highlighted in the Special Report on 1.5ºC and more thoroughly in the last IPCC report that future warming is tied to future emissions, and that warming will effectively cease only once anthropogenic CO2 emissions are balanced by anthropogenic CO2 removals. </p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif"><font size="4">But some activists have (rightly) pointed out that large-scale CO2 removals are as yet untested, and so reliance on them to any significant extent to balance out emissions</font></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif"><font size="6">is akin not really committing to net zero at all. </font></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif"><font size="4">Their point is that “net-zero” is not zero and hence will serve as a smokescreen for insufficient climate action. </font></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif">To help sort this out some background might be helpful.<br></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif"><span style="box-sizing:inherit;font-weight:700">Net-zero CO2 has real geophysical significance</span></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif"><span style="box-sizing:inherit;font-weight:700"></span></p><div class="gmail-wp-block-image" style="box-sizing:inherit;margin:0px 0px 1em;color:rgb(20,49,80);font-family:Raleway,sans-serif;font-size:12px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"></div><p></p><p style="box-sizing:inherit;margin:0px 0px 26px;padding:0px;color:rgb(20,49,80);font-family:Raleway,sans-serif;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font size="4">With empirical data and more and better modeling, it has become clear that, to first approximation, the eventual anthropogenic warming from carbon dioxide is tied to the cumulative emissions. This figure is from the AR6 SPM:</font></p><div><span style="box-sizing:inherit;font-weight:700">Every tonne of CO2 emissions adds to global warming</span></div><div>--------------------------------------<br></div><div>Vision2020 Post: Ted Moffett</div><span id="gmail-more-24164" style="box-sizing:inherit;color:rgb(20,49,80);font-family:Raleway,sans-serif;font-size:12px"></span><span style="color:rgb(20,49,80);font-family:Raleway,sans-serif;font-size:12px"></span></div></div></div></div></div>