<story><title>Levels of banned CFCs rising</title><url>https://www.nature.com/articles/d41586-023-00940-2</url></story><parent_chain><item><author>hammock</author><text>&amp;gt;The collective annual warming effect of these five chemicals on the planet is equivalent to the emissions produced by a small country like Switzerland.&lt;p&gt;Why is warming effect what matters here? During the original CFC crisis, it was the hole in the ozone layer we were more worried about.</text></item><item><author>ryanblakeley</author><text>&amp;gt; The collective annual warming effect of these five chemicals on the planet is equivalent to the emissions produced by a small country like Switzerland.&lt;p&gt;&amp;gt; When CFCs were phased out, hydrofluorocarbons (HFCs) were brought in as substitutes. But CFCs can crop up as unintended by-products during HFC manufacture.&lt;p&gt;&amp;gt; The appearance of CFC-13 is much more baffling. “We really have no clue” where the emissions are coming from, Vollmer says. “We don’t know of any chemical process where this will show up as a by-product.”</text></item></parent_chain><comment><author>dashundchen</author><text>Because it&amp;#x27;s non-negligible source of warming greenhouse gases that is completely avoidable - we have plenty of substitutes available to us with lower global warming potential. Releasing 1 kg of CFC-13 will trap the same amount of heat as 14,000 kg of CO2.&lt;p&gt;Project Drawdown lists managing refrigerants as one of the top 10 solutions to limit warming in both 1.5 and 2C scenarios.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.drawdown.org&amp;#x2F;solutions&amp;#x2F;table-of-solutions&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.drawdown.org&amp;#x2F;solutions&amp;#x2F;table-of-solutions&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.drawdown.org&amp;#x2F;solutions&amp;#x2F;refrigerant-management&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.drawdown.org&amp;#x2F;solutions&amp;#x2F;refrigerant-management&lt;/a&gt;</text></comment>
<story><title>Levels of banned CFCs rising</title><url>https://www.nature.com/articles/d41586-023-00940-2</url></story><parent_chain><item><author>hammock</author><text>&amp;gt;The collective annual warming effect of these five chemicals on the planet is equivalent to the emissions produced by a small country like Switzerland.&lt;p&gt;Why is warming effect what matters here? During the original CFC crisis, it was the hole in the ozone layer we were more worried about.</text></item><item><author>ryanblakeley</author><text>&amp;gt; The collective annual warming effect of these five chemicals on the planet is equivalent to the emissions produced by a small country like Switzerland.&lt;p&gt;&amp;gt; When CFCs were phased out, hydrofluorocarbons (HFCs) were brought in as substitutes. But CFCs can crop up as unintended by-products during HFC manufacture.&lt;p&gt;&amp;gt; The appearance of CFC-13 is much more baffling. “We really have no clue” where the emissions are coming from, Vollmer says. “We don’t know of any chemical process where this will show up as a by-product.”</text></item></parent_chain><comment><author>bluGill</author><text>Both matter, though warming wasn&amp;#x27;t considered a big deal, the media was still coming away from warning about a coming ice age (i&amp;#x27;ve never figured out what was going on there, as a kid I heard it more than once, but now few admit the scare existed). The ozone hole was a big deal.&lt;p&gt;Now that CFCs are banned the ozone layer is recovering. I&amp;#x27;m guessing these emissions are not really enough to harm the ozone layer much (so long as they don&amp;#x27;t get worse!), but they add to greenhouse gases that are not in control.</text></comment>