This is total junk science. The entire field of industrial hygiene is based on the dose response model. To assume that any "toxic" has a zero threshold is crazy. The best example is the trace minerals that are necessary to support human life. My morning dose of caffeine is heart healthy but probably carcinogenic just like the alcohol in my red wine. Paracelsus said way back in the late 1400's that "=E2=80=A6"Everything is a poison, nothing is a poison. It is the dose that makes the poison"

I could go on but won't.

The point is that we do need to regulate air pollutants in a sensible manner that considers cost/benefit. The EPA has been out of control for years and needs to be reformed so that they can continue to achieve their mission without hysteria from the press.

Zack

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of TILAK CHANDRA
Sent: Wednesday, February 20, 2019 10:16 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Scientist says some pollution is good for you - a disputed claim Trump's EPA has embraced

Thank you Rob!

To verify the actual toxicity of various pollutants/particulates, we need to have the data on human clinical trials, not on other species According to recent UNO report, 4.2 million deaths occur each year due to air pollution. Also, how we are going to measure low and high pollution.

This will be a good puzzle for Dr. Alan Hall, a toxicologist to interpret reported toxicological data published in peer review journals about some pollution is good for humans.

Tilak

---

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of ILPI Support <info**At_Symbol_Here**ILPI.COM>
Sent: Wednesday, February 20, 2019 6:03:40 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Scientist says some pollution is good for you - a disputed claim Trump's EPA has embraced

The title of this LA Times article speaks for itself. Interesting to hear what "mainstream" toxicologists have to say on this.

https://www.latimes.com/local/california/la-me-secret-science-20190219-story.html

Rob Toreki

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