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Chuck Haas

@chuckhaas.bsky.social

Professor of Environmental Engineeering at Drexel University. Water treatment & reuse, risk assessment (especially microbiological risk) & environmental health. Member, National Academy of Engineering #Philadelphia also @ProfCharlesHaas@mastodon.social

334 Followers  |  189 Following  |  58 Posts  |  Joined: 13.10.2023  |  1.9018

Latest posts by chuckhaas.bsky.social on Bluesky

Amazon controls over a third of the global cloud computing market.

Its customers include Capital One, United Airlines, and the US Army.

Today's outage should be a wakeup call: Dependence on a handful of powerful corporations is a threat to economic and national security.

20.10.2025 23:41 โ€” ๐Ÿ‘ 7573    ๐Ÿ” 2735    ๐Ÿ’ฌ 251    ๐Ÿ“Œ 119

I donโ€™t know who needs to hear this but the CDC is being eviscerated right now. America is not going to have any kind of outbreak response capacity after tonight. Americansโ€™ health data is no longer secure. Say goodbye to federal public health in any capacity. Itโ€™s a disaster. We wonโ€™t recover.

11.10.2025 03:05 โ€” ๐Ÿ‘ 13945    ๐Ÿ” 6183    ๐Ÿ’ฌ 518    ๐Ÿ“Œ 397

This is beyond bad. All of our disease defenses are down now. We are sitting ducks. This is #RussellVought #DonaldTrump. They are endangering American lives with their insane crusade. These men are hazardous to your health and dangerous to the republic.

11.10.2025 10:06 โ€” ๐Ÿ‘ 237    ๐Ÿ” 106    ๐Ÿ’ฌ 7    ๐Ÿ“Œ 2

they are destroying US climate science on purpose, and it hurts my heart. but take it from an MIT-trained nerdass:

all most of us need to know is that we have to stop burning stuff

stop burning stuff for heat

stop burning stuff for make car go

stop burning stuff for power

we have the tools

30.09.2025 02:27 โ€” ๐Ÿ‘ 3158    ๐Ÿ” 752    ๐Ÿ’ฌ 10    ๐Ÿ“Œ 48
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Opinion | We Are Watching a Scientific Superpower Destroy Itself

โ€œWe will never know what diseases might have been cured or what advances in technology might have been invented had the lights not gone out in the labs.โ€
๐Ÿงช #giftarticle

08.09.2025 14:04 โ€” ๐Ÿ‘ 98    ๐Ÿ” 36    ๐Ÿ’ฌ 5    ๐Ÿ“Œ 1

Vaccines are safe and effective. RFK Jr. isnโ€™t.

28.08.2025 01:43 โ€” ๐Ÿ‘ 14029    ๐Ÿ” 3186    ๐Ÿ’ฌ 222    ๐Ÿ“Œ 85

Want to move to Switzerland? We are looking for a postdoc to study airborne viruses:
careers.epfl.ch/job/Lausanne...

@linseymarr.bsky.social @lakdawalalab.bsky.social @corsiaq.bsky.social @influenzal.bsky.social @chuckhaas.bsky.social

11.08.2025 16:06 โ€” ๐Ÿ‘ 9    ๐Ÿ” 12    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Under RFK Jr, CDC skips study on vaccination rates, quietly posts data on drop Vaccination rates fell once again as nonmedical exemptions hit a new high.

Vaccination rates are falling - and RFK Jr.โ€™s CDC doesnโ€™t want you to know. They skipped their flagship vaccine coverage study and quietly posted redacted data.

Transparency should not be optional in public health.

zurl.co/Qzn1P

05.08.2025 11:37 โ€” ๐Ÿ‘ 209    ๐Ÿ” 78    ๐Ÿ’ฌ 13    ๐Ÿ“Œ 5
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Assistant/Associate/Full Professor - Climate Equity and Environmental Justice - Rausser College of Natural Resources University of California, Berkeley is hiring. Apply now!

UC-Berkeley has an open-rank faculty position in our incredible Climate Equity and Environmental Justice (CEEJ) research cluster. It is an extraordinary interdisciplinary group working across multiple colleges and departments at the university! More information here: aprecruit.berkeley.edu/JPF04842

12.07.2025 00:02 โ€” ๐Ÿ‘ 142    ๐Ÿ” 86    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 3
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The Mythical Man-Month - Wikipedia

rediscovery of this fallacy?
en.wikipedia.org/wiki/The_Myt...

27.06.2025 11:01 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

DOE ASR program manager just sent a colleague an excerpt from the WH DOE budget that was stealthily dropped: โ€œBER activities in environmental system sciences, atmospheric system research, earth system modeling, data management, and the Atmospheric Radiation Measurement User Facility are terminated."

01.06.2025 01:09 โ€” ๐Ÿ‘ 32    ๐Ÿ” 20    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 3

Au contraire, counselor - maybe a market exists for food grade cookable ricotta containers?

28.05.2025 21:24 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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AXIOS: โ€œ.. AI could wipe out half of all entry-level white-collar jobs โ€” and spike unemployment to 10-20% in the next one to five years, [Anthropic CEO] Amodei told us in an interview ..โ€

@axios.com
www.axios.com/2025/05/28/a...

28.05.2025 10:23 โ€” ๐Ÿ‘ 605    ๐Ÿ” 244    ๐Ÿ’ฌ 91    ๐Ÿ“Œ 54
Quote Origin: Not Everything That Can Be Counted Counts, and Not Everything That Counts Can Be Counted โ€“ Quote Investigatorยฎ

"not everything that can be counted counts, and not everything that counts can be counted". quoteinvestigator.com/2010/05/26/e...

11.05.2025 16:52 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Following all of the Bluesky accounts of the Academies is as simple as adding the accounts in our starter pack. And there's a few feeds to boot! go.bsky.app/CeBKkMs

12.04.2025 14:31 โ€” ๐Ÿ‘ 8    ๐Ÿ” 6    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Science & the innovation economy are under threat.

"We hold diverse political beliefs, but we are united as researchers in wanting to protect independent scientific inquiry. We are sending this SOS to sound a clear warning: the nationโ€™s scientific enterprise is being decimated."

Read & share ... ๐Ÿ‘‡

31.03.2025 17:48 โ€” ๐Ÿ‘ 19    ๐Ÿ” 12    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

People have no understanding of the enormous avoided health costs that EPA has made possible. The Clean Air Act alone has paid for all of EPA's costs by a factor of nearly 100.

18.03.2025 18:56 โ€” ๐Ÿ‘ 59    ๐Ÿ” 18    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 1
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Trump Administration Aims to Eliminate E.P.A.โ€™s Scientific Research Arm (Gift Article) More than 1,000 chemists, biologists and other scientists could be laid off under a plan to dismantle the Office of Research and Development.

The air quality and health models I have used throughout my career have emerged from EPAโ€™s Office of Research and Development. Shuttering it would be a devastating loss.
www.nytimes.com/2025/03/17/c...

18.03.2025 11:34 โ€” ๐Ÿ‘ 9    ๐Ÿ” 6    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 2
Illegal dumping grounds off the New Jersey turnpike across from Manhattan in the 1970s

Illegal dumping grounds off the New Jersey turnpike across from Manhattan in the 1970s

Smog rolling on over Manhattan in the 1970s

Smog rolling on over Manhattan in the 1970s

This is what many cities in the U.S. looked like before the EPA.

Why the heck would anyone celebrate deregulating it?

13.03.2025 00:37 โ€” ๐Ÿ‘ 10607    ๐Ÿ” 3548    ๐Ÿ’ฌ 477    ๐Ÿ“Œ 228

Measles is caused by the measles, or rubeola, virus. It transmits through the air and is extremely contagious. Its reproduction number is estimated to be 12-18, so each infected person generates 12-18 new cases in a susceptible population. Best way to avoid it: vaccination.

21.02.2025 16:34 โ€” ๐Ÿ‘ 79    ๐Ÿ” 29    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1

Terminology is important as it can be very confusing to mix up those descriptors and folks think measles was wiped out in human populations. "Eradicated from the US" is not a thing. TYVM for this moment of pedantry.

26.02.2025 21:13 โ€” ๐Ÿ‘ 43    ๐Ÿ” 6    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Our study found that the transmission risk of measles among unvaccinated students is >โ€‰70 times higher than properly immunized ones

26.02.2025 21:18 โ€” ๐Ÿ‘ 17    ๐Ÿ” 3    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Bluesky Deletes AI Protest Video of Trump Sucking Musk's Toes, Calls It 'Non-Consensual Explicit Material' Bluesky has deleted the most viral post reporting on an internal government protest agains the President of the United States and the world's richest man.

Why, although I have an active account here, I do not consider this to be a primary vehicle, since like other corporately owned social media, it seems to be succumbing to censorship. I prefer the #fediverse / #mastodon @joinmastodon.org.web.brid.gy

www.404media.co/bluesky-dele...

26.02.2025 21:07 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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ALLEA Statement on Threats to Academic Freedom and International Research Collaboration in the United States

They are also asking other organizations to endorse the statement here:
๐Ÿงช
allea.org/portfolio-it...

23.02.2025 17:50 โ€” ๐Ÿ‘ 33    ๐Ÿ” 10    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1

Hmm. Joe, you are raising an interesting point. I wiped my account on the bird site about a month ago. The question is whether there can be genuine dialog and communication there without entering into a mud fight. At the moment, I'm mainly on #Mastodon, #LinkedIn, and here.

23.02.2025 15:42 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Ah, mere externalities (in the words of economists)

23.02.2025 12:22 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Quote from article about calls for placebo-controlled studies of vaccines.

Quote from article about calls for placebo-controlled studies of vaccines.

Unfortunately, I think years of dogmatic attitudes in some corners of science along the lines of โ€˜RCT is the only trustworthy form of evidenceโ€™ etc. have helped make space for flawed arguments like the below: www.washingtonpost.com/health/2025/...

22.02.2025 09:44 โ€” ๐Ÿ‘ 99    ๐Ÿ” 17    ๐Ÿ’ฌ 11    ๐Ÿ“Œ 1
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Eating Oneโ€™s Seed Corn I was going to start a longer blog post, which I hope to finalize in the next day or so. ย But current times (as I write this, it is immediately after the St. Valentineโ€™s Day Massacre of personnel iโ€ฆ

"Eating Oneโ€™s Seed Corn" - a blog post: chaasblog.wordpress.com/2025/02/19/e...

20.02.2025 00:27 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

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