<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>vilhelm_s</author><text>A house older than three decades, but there was an interesting story (previously discussed on Hacker News) about some poor guy unexpectedly finding a huge lump, probably left over from an old heating system.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;news.ycombinator.com&amp;#x2F;item?id=10357115&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;news.ycombinator.com&amp;#x2F;item?id=10357115&lt;/a&gt;</text><parent_chain><item><author>sbierwagen</author><text>1) DOT4 doesn&amp;#x27;t exactly jump through the skin-- it&amp;#x27;s no dimethylmercury, or even DMSO. Its MSDS recommends against &amp;quot;prolonged&amp;quot; skin contact. It&amp;#x27;s not much worse than any other common hydrocarbon solvent, like gasoline. &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.brake-eng.com&amp;#x2F;global&amp;#x2F;downloads&amp;#x2F;dot4fl%20dot%204%20material%20safety%20data%20sheet.pdf&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.brake-eng.com&amp;#x2F;global&amp;#x2F;downloads&amp;#x2F;dot4fl%20dot%204%2...&lt;/a&gt;&lt;p&gt;2.) Hot water certainly doesn&amp;#x27;t &amp;quot;evaporate&amp;quot; lead-- lead&amp;#x27;s boiling point is 1700C. Hot water can &lt;i&gt;leach&lt;/i&gt; lead from solder joints, if your water isn&amp;#x27;t treated properly: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.epa.gov&amp;#x2F;ground-water-and-drinking-water&amp;#x2F;basic-information-about-lead-drinking-water&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.epa.gov&amp;#x2F;ground-water-and-drinking-water&amp;#x2F;basic-in...&lt;/a&gt;&lt;p&gt;3.) Yeah, lead solder isn&amp;#x27;t great to spend a lot of time with, which is why RoHS was introduced in 2003: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Restriction_of_Hazardous_Substances_Directive&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Restriction_of_Hazardous_Subst...&lt;/a&gt;&lt;p&gt;4.) Where are you going to find bulk metallic mercury in any house built in the last three decades?&lt;p&gt;5.) Lead paint was also phased out years ago.&lt;p&gt;6.) Leaded avgas &lt;i&gt;does&lt;/i&gt; still exist, and &lt;i&gt;is&lt;/i&gt; bad. Don&amp;#x27;t buy property near airports that fly small planes.&lt;p&gt;7.) Teflon is about as chemically inert as a flororcarbon can possibly be. You might be thinking of Perfluorooctanoic acid, which is involved in Teflon production, and is pretty nasty: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Perfluorooctanoic_acid&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Perfluorooctanoic_acid&lt;/a&gt;&lt;p&gt;8.) Aluminum cookware isn&amp;#x27;t toxic, are you nuts?</text></item><item><author>xlayn</author><text>There are things that we shouln&amp;#x27;t work with, but we do because we don&amp;#x27;t know the associated risk, some examples:&lt;p&gt;&lt;pre&gt;&lt;code&gt;  -maintenance of your DOT4 brakes? do not touch the DOT4
   brake fuild, it&amp;#x27;s absorbed though your skin and it will
   kill your kidneys when they try to filter it.
  -Old house in america? check you don&amp;#x27;t have any pipe 
   soldered with lead, hot water will eventually make it 
   evaporate
  -lead in electrical solder wire
  -mercury, a powerful neuro-toxin
&lt;/code&gt;&lt;/pre&gt;
Edit:&lt;p&gt;&lt;pre&gt;&lt;code&gt;  -again, old house, check to change the paint, yep, lead
   in the pain again.
  -close to an airport? beside noise, lead in the airplanes 
   fuel
  -Teflon... again Dupont and 3M
  -Aluminum on cookware... toxic
&lt;/code&gt;&lt;/pre&gt;
lead was one of the technical debts introduced by a guy (1)... the same guy who introduce it to the fuel making a generation at least 10 iq point less smart.... and created the CFCs in aerosol... Dupont, GM and others did a lot of money on that.... as always.&lt;p&gt;(1) &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Thomas_Midgley,_Jr&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Thomas_Midgley,_Jr&lt;/a&gt;.</text></item></parent_chain></comment><story><title>Things I Won’t Work With: Peroxide Peroxides (2014)</title><url>http://blogs.sciencemag.org/pipeline/archives/2014/10/10/things_i_wont_work_with_peroxide_peroxides</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>steffan</author><text>While we&amp;#x27;re issuing corrections...&lt;p&gt;&amp;gt; Hot water can leech lead from solder joints,&lt;p&gt;It&amp;#x27;s &lt;i&gt;leach&lt;/i&gt;</text><parent_chain><item><author>sbierwagen</author><text>1) DOT4 doesn&amp;#x27;t exactly jump through the skin-- it&amp;#x27;s no dimethylmercury, or even DMSO. Its MSDS recommends against &amp;quot;prolonged&amp;quot; skin contact. It&amp;#x27;s not much worse than any other common hydrocarbon solvent, like gasoline. &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.brake-eng.com&amp;#x2F;global&amp;#x2F;downloads&amp;#x2F;dot4fl%20dot%204%20material%20safety%20data%20sheet.pdf&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.brake-eng.com&amp;#x2F;global&amp;#x2F;downloads&amp;#x2F;dot4fl%20dot%204%2...&lt;/a&gt;&lt;p&gt;2.) Hot water certainly doesn&amp;#x27;t &amp;quot;evaporate&amp;quot; lead-- lead&amp;#x27;s boiling point is 1700C. Hot water can &lt;i&gt;leach&lt;/i&gt; lead from solder joints, if your water isn&amp;#x27;t treated properly: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.epa.gov&amp;#x2F;ground-water-and-drinking-water&amp;#x2F;basic-information-about-lead-drinking-water&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.epa.gov&amp;#x2F;ground-water-and-drinking-water&amp;#x2F;basic-in...&lt;/a&gt;&lt;p&gt;3.) Yeah, lead solder isn&amp;#x27;t great to spend a lot of time with, which is why RoHS was introduced in 2003: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Restriction_of_Hazardous_Substances_Directive&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Restriction_of_Hazardous_Subst...&lt;/a&gt;&lt;p&gt;4.) Where are you going to find bulk metallic mercury in any house built in the last three decades?&lt;p&gt;5.) Lead paint was also phased out years ago.&lt;p&gt;6.) Leaded avgas &lt;i&gt;does&lt;/i&gt; still exist, and &lt;i&gt;is&lt;/i&gt; bad. Don&amp;#x27;t buy property near airports that fly small planes.&lt;p&gt;7.) Teflon is about as chemically inert as a flororcarbon can possibly be. You might be thinking of Perfluorooctanoic acid, which is involved in Teflon production, and is pretty nasty: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Perfluorooctanoic_acid&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Perfluorooctanoic_acid&lt;/a&gt;&lt;p&gt;8.) Aluminum cookware isn&amp;#x27;t toxic, are you nuts?</text></item><item><author>xlayn</author><text>There are things that we shouln&amp;#x27;t work with, but we do because we don&amp;#x27;t know the associated risk, some examples:&lt;p&gt;&lt;pre&gt;&lt;code&gt;  -maintenance of your DOT4 brakes? do not touch the DOT4
   brake fuild, it&amp;#x27;s absorbed though your skin and it will
   kill your kidneys when they try to filter it.
  -Old house in america? check you don&amp;#x27;t have any pipe 
   soldered with lead, hot water will eventually make it 
   evaporate
  -lead in electrical solder wire
  -mercury, a powerful neuro-toxin
&lt;/code&gt;&lt;/pre&gt;
Edit:&lt;p&gt;&lt;pre&gt;&lt;code&gt;  -again, old house, check to change the paint, yep, lead
   in the pain again.
  -close to an airport? beside noise, lead in the airplanes 
   fuel
  -Teflon... again Dupont and 3M
  -Aluminum on cookware... toxic
&lt;/code&gt;&lt;/pre&gt;
lead was one of the technical debts introduced by a guy (1)... the same guy who introduce it to the fuel making a generation at least 10 iq point less smart.... and created the CFCs in aerosol... Dupont, GM and others did a lot of money on that.... as always.&lt;p&gt;(1) &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Thomas_Midgley,_Jr&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Thomas_Midgley,_Jr&lt;/a&gt;.</text></item></parent_chain></comment><story><title>Things I Won’t Work With: Peroxide Peroxides (2014)</title><url>http://blogs.sciencemag.org/pipeline/archives/2014/10/10/things_i_wont_work_with_peroxide_peroxides</url></story>