@ProfCharlesHaas

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
@[email protected] linkedin.com/in/chuckhaas chaasblog.wordpress.com/

Charles Haas, NAE,BCEEM,F AEESP,F ASCE,Dist F IWA,F AEESP - American Academy of Environmental...

Charles N. Haas is the L.D. Betz Professor of Environmental Engineering and Distinguished… · Experience: American Academy of Environmental Engineers and Scientists · Education: University of Illinois...

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Chuck Haas retweeted
Neil Stone
@DrNeilStoneOct 26
A water plant near Pretoria 🇿🇦 ran for 21 days without chlorine Over 400 people fell ill and E. coli turned up throughout the supply That's what "chemical-free water" actually looks like
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What happens to end of life of (various components of) data centers - we need to think ahead. #datacenters #adaptivereuse A new blog piece: chaasblog.wordpress.com/2026…

Designing Today’s Data Centers for Tomorrow’s Reuse

In the years after World War II, as highways extended outward and housing followed, the shopping center became a defining building type of the American suburb, and the fully enclosed regional mall …

chaasblog.wordpress.com
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At the #NAEAnnualMeeting today and tomorrow.
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Chuck Haas retweeted
Barry Hunt
@BarryHunt008Oct 2
"Prolonged Infectivity of Murine Norovirus in Aerosols Suggests Potential for Airborne Transmission" TL;dr Norovirus is viable in air even longer than Flu Huh 🤔
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Good Engineering for Bad Purposes. A musing on #engineeringethics chaasblog.wordpress.com/2026…

Good Engineering for Bad Purposes

1. A ventilation problem Suppose you are handed the following problem. A sealed room of known volume contains a toxic gas at a known concentration. The client wants the room cleared to a safe level…

chaasblog.wordpress.com
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Chuck Haas retweeted
John Bistline@JEBistlineSep 15
Data centers: “We use 17.4 billion gallons of water a year.” Agriculture: “That’s adorable.”
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Ashish K. Jha
@ashishkjhaSep 10
We are sleepwalking into a potentially huge disaster And it amazes me how little attention it is getting.
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Gloria DeGeorge
@DeGeorgeGAug 28
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Bob Golen
@BobGolenAug 28
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Ashish K. Jha
@ashishkjhaAug 25
Extraordinarily sad. The tragedy here is that these deaths are entirely preventable with a safe, cheap intervention -- the MMR vaccine
The New York Times
@nytimesAug 25
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

Two Unvaccinated People Died From Measles in Pennsylvania, Officials Say

The deaths were the first in the United States in 2026.

nytimes.com
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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…

Co-Creation: The Next Rung, Not a Different Ladder

When I started college, the working definition of a real programmer was someone who wrote in Assembly. FORTRAN existed, and it was viewed with something close to disdain — a language for people who…

chaasblog.wordpress.com
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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…

Co-Creation: The Next Rung, Not a Different Ladder

When I started college, the working definition of a real programmer was someone who wrote in Assembly. FORTRAN existed, and it was viewed with something close to disdain — a language for people who…

chaasblog.wordpress.com
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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
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Chuck Haas retweeted
Saganism
@SaganismmAug 11
“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
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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?
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Epistemic trespass and Research parasites Thoughts in a new blog piece #epistemictrespass #researchparasites #interdisciplinarity chaasblog.wordpress.com/2026…

In Praise of Epistemic Trespassers and Research Parasites

1. The weed in the field A farmer walks his carefully cultivated field and notices an unfamiliar plant among the crop. He recognizes a weed — an invader competing for nutrients, water, and light. H…

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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
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Ashish K. Jha
@ashishkjhaAug 6
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
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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.
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