
Betz Prof. Environ Eng - Drexel University. Philadelphia. All thoughts my own and not official. Member @theNAEng https://xitter.cf/t.co/vPkk0EtbDw
Philadelphia, Pennsylvania
Joined May 2025
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Replying to @ProfCharlesHaas
Chuck Haas retweeted
"Prolonged Infectivity of Murine Norovirus in Aerosols Suggests Potential for Airborne Transmission"
TL;dr
Norovirus is viable in air even longer than Flu
Huh 🤔
Good Engineering for Bad Purposes. A musing on #engineeringethics
chaasblog.wordpress.com/2026…
Chuck Haas retweeted
Data centers: “We use 17.4 billion gallons of water a year.”
Agriculture: “That’s adorable.”
Chuck Haas retweeted
We are sleepwalking into a potentially huge disaster
And it amazes me how little attention it is getting.
Chuck Haas retweeted
Extraordinarily sad.
The tragedy here is that these deaths are entirely preventable with a safe, cheap intervention -- the MMR vaccine
Breaking News: Two unvaccinated people in Pennsylvania died from measles, the first deaths from the disease this year in the U.S., as a large outbreak there continues to spread. nyti.ms/4qCojov
I am reposting this (just upped to Premium to test the reach)
New blog post: "Co-creation: The Next Rung Not a Different Ladder" Is the use of LLM really programming? And what do we do? An engineering perspective. #AI #Programming
chaasblog.wordpress.com/2026…
New blog post: "Co-creation: The Next Rung Not a Different Ladder"
Is the use of LLM really programming? And what do we do? An engineering perspective.
#AI #Programming
chaasblog.wordpress.com/2026…
My new book "Environmental Engineering for Pathogen Control" launches Aug 2026. 560 pages of NAE-level insights on air, water, and soil. Pre-order via Amazon: amazon.com/Environmental-Eng… #QMRA #PublicHealth
Chuck Haas retweeted
“Monsters exist, but they are too few in number to be truly dangerous. More dangerous are the common men, the functionaries ready to believe and to act without asking questions.”
— Primo Levi
Chuck Haas retweeted
5/n so we went from vaccinating vs 8 diseases to 17 and in so doing mostly stopped the deaths and hospitalizations from children infections. I ask HHS, tell me the diseases you want to bring back?
Epistemic trespass and Research parasites
Thoughts in a new blog piece
#epistemictrespass #researchparasites #interdisciplinarity
chaasblog.wordpress.com/2026…
Chuck Haas retweeted
Join us Aug. 20 at 11 a.m. ET for Perspectives on Avian Influenza featuring Dr. Mark Powell and Dr. Louise Moncla.
Hear the latest research on H5N1, outbreak trends, surveillance, and what it means for the future of risk analysis.
Register: loom.ly/3GZ0t8o
Chuck Haas retweeted
I've spent the last 3 years working on how we protect society as biology becomes easier to engineer
This week: scientists in a Palo Alto lab used AI to design a working virus.
They built in safeguards. Unfortunately, many others will not
Chuck Haas retweeted
We're excited to welcome Chris Stone, P.E., F.NSPE, F.ASCE, LEED AP as the new Executive Director of AAEES
We look forward to the future under his leadership and to the exciting opportunities ahead for our members and the profession.
Academic Writing - workflow in the age of #AI
Some thoughts on my recent personal experience
chaasblog.wordpress.com/2026…
Chuck Haas retweeted
I emailed Dr. Tony Fauci today to tell him how disgusted and sad I was with how he has been being treated. I told him he is a hero and has my support and my admiration.
I reminded him who I was: the “aerosol activist.” During COVID I pushed him — and pushed him, and would not let it go — until he said out loud that the SARS-2 virus travels through the air. He graciously heard me out in a Zoom meeting. He changed what he said. That is not a small thing in a man with that much on his shoulders.
So today I sent a note of thanks, and shared our latest work on the Tijuana River at the US-Mexico border. I almost didn’t send it. He is flooded right now, and I figured it might never reach him.
He wrote back within the hour. Thanked me, and told me to keep up the great work.
A man under relentless attack still made time to answer someone he owed nothing to — and to encourage her work while he’s fighting for his own name. Gracious, ethical, kind. Exactly the qualities the people going after him are trying to strip out of our society.
I stand with Dr. Fauci. He is a hero. Sad times in America continue.




















