<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>athoun</author><text>To add a data point, I recently had a grandparent who died with Parkinson&amp;#x27;s disease.&lt;p&gt;After doing research, it turns out their home was located very close to a Superfund cleanup site from a dry cleaner that operated in the 60&amp;#x27;s and contaminated the groundwater with TCE and PCE.
The chemicals leach into the groundwater and can spread hundreds of feet per year. Buildings located over these plumes are exposed to vapors which accumulate indoors over time and expose the occupants.&lt;p&gt;According to Wikipedia, the PCE solvent which is used at nearly every dry cleaner across the country has been known as a x10 risk factor for Parkinson&amp;#x27;s [1].&lt;p&gt;For California residents, you can find out about these groundwater plumes on the waterboards website. They are located all over Silicon Valley and former dry-cleaners around the country [2].&lt;p&gt;[1]: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Tetrachloroethylene&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Tetrachloroethylene&lt;/a&gt;&lt;p&gt;[2]: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;geotracker.waterboards.ca.gov&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;geotracker.waterboards.ca.gov&amp;#x2F;&lt;/a&gt;</text><parent_chain></parent_chain></comment><story><title>Rates of Parkinson’s disease are exploding. A common chemical may be to blame</title><url>https://www.theguardian.com/commentisfree/2021/apr/07/rates-of-parkinsons-disease-are-exploding-a-common-chemical-may-be-to-blame</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>sbehlasp</author><text>Surprise to see that we are pointing and blaming one chemical only here. PFAS, a class of more than 4,000 different chemicals, is everywhere [&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;on.natgeo.com&amp;#x2F;2Q2UtMS&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;on.natgeo.com&amp;#x2F;2Q2UtMS&lt;/a&gt;] food, water we drink and even in our blood. We don&amp;#x27;t even know when and how we are consuming it directly or indirectly.
Do we have any kind of full proof study about all 4000 chemicals, that how these chemicals would be affecting our health! 
I think nature has already been polluted&amp;#x2F;damaged to an extent which is kind-a irreversible. Hoping for the better world.</text><parent_chain></parent_chain></comment><story><title>Rates of Parkinson’s disease are exploding. A common chemical may be to blame</title><url>https://www.theguardian.com/commentisfree/2021/apr/07/rates-of-parkinsons-disease-are-exploding-a-common-chemical-may-be-to-blame</url></story>