Today’s NYT article is going to make a lot of my climate science colleagues angry and worried. Please remember that, yes, most climate deniers are Republicans. But, most Republicans are not climate deniers. The only way we make progress is by working together.

PVC, the third most mass-produced plastic in the world, is tough to recycle. But Tyeshia Sapp, 2025 #USCWrigley Graduate Fellow, is making it easier. Learn about how she's finding ways to make useful products from waste PVC: dornsife.usc.edu/wrigley/2025...

@uscwrigley.usc.edu and I are hosting the great Oliver Jeffers at the LA Central Library this Thursday at 5:00pm. Please come and be my guest. Tickets available here and use the code DELTAVIP2025 to get them for free:

Maybe for their next trick, #NYT will account for the human and environmental health externalities of petrol (and even hybrid) powered autos. I drive an #EV for a lot of reasons. Cost of charging isn’t one of them.

This isn’t only at happening at Harvard.

Three Mile Island wasn’t the worst nuclear disaster in American history. Read about what was and the research @joearvai.org, @aitormarcos.bsky.social, and I are doing to understand risky decision-making in this ✨unusual✨context. dornsife.usc.edu/wrigley/2025...

🚨🚨🚨Attention @dornsife.usc.edu and @USC.edu students! Enrollment is open for the @uscwrigley.usc.edu Summer Residential College on the #Environment. Develop hands-on skills, expand your knowledge, and soak up the beauty of our campus in a MPA on Catalina Island. Classes fill up fast. Don’t wait!

The group that authored a controversial report sowing doubt in the severity of #climatechange has been disbanded. I’ve said and written many times before, what to do in response to climate change is very much an open question. But whether climate change is real and consequential is not.

Yes, a talented artist. Also a graceful, thoughtful, and civil activist. Class act all the way. We need more like him.

🚨🚨🚨Hey @dornsife.usc.edu @usc.edu @uscwrigley.usc.edu students, I'm once again offering my class, "It's not easy being green: Decision-making for #sustainable action", in spring 2026. The class splits its time between LA and #Switzerland. There are only 16 spots so sign-up soon if you're interested.

Motherfucking #windfarms. With delicious windfarm chips and artificial reefs to make SpongeBob happy. Nice. youtu.be/TRzEzU7kwyQ?...

If what the timing suggests is true, this is another cowardly move by CBS. Edward R. Murrow and Mike Wallace are rolling in their graves.

Meanwhile in Los Angeles…

Just learned my home in DTLA is in the curfew zone. At once bummed and proud about this. Bummed for the local shops and businesses whose employees won’t earn a full day’s pay. Proud of my city and neighborhood for standing up to bullies.

It was only a matter of time. And this is just the beginning with peak storm season approaching. My heart goes out to thise in harm’s way. www.nytimes.com/2025/05/16/w...

As a decision scientist, I teach my students about the pitfalls of cherry picking outliers and using them to make sweeping generalizations. I'll be using this editorial from Steven Davidoff Solomon from @ucberkeleylaw.bsky.social in my classes next year. www.wsj.com/opinion/you-...

Let’s go #Oilers!!! Never say die with this lineup! Incredible comeback! Again. 🙌

A quick heads up that my Bluesky domain has changed. I can now be found at bsky.app/profile/joea....

My terrific colleague, @alexsegrecohen.bsky.social, led a study where we looked at US counties with worst drinking water violations. We also asked about people's perceptions about risks associated with privatized #water systems. You can learn more about the research here: thehill.com/policy/energ...

Some #cleanenergy enthusiasm from the @uscwrigley.usc.edu #Climate Forward conference, courtesy of @zacnews.bsky.social. substack.com/inbox/post/1...

Introducing #FridayFacts from @uscwrigley.usc.edu. It’s your new favorite way to get smarter about #climate and #sustainability topics (with a side of myth-busting)! First up, let’s breaks down the direct air capture, #DAC, of #CO2: what it does and doesn’t do 🤔. youtube.com/watch?v=_NJR...

Thank you for being our guest!

🌏 Introducing #FridayFacts, your new favorite way to get smarter about climate and sustainability topics. First up, #USCWrigley Director Joe Árvai breaks down direct air capture (DAC). Watch the full video: youtu.be/_NJR-_-6nOc?... @decisionlab.bsky.social @dornsife.usc.edu

What a privilege it was to discuss the energy transition and a bipartisan strategy for making progress on #climatechange with someone I so admire: Jennifer Granholm. Thank you Secretary and Governor Granholm for spending a few hours with me at USC today.

Thank you @katharinehayhoe.com for including me in your starter pack of Canadian #climate scientists. Now, more than ever, it’s time for us Canucks to step up!

You must check out the work of @aitormarcos.bsky.social. He’d make for a great partner on your scientific journey.

Come join us tomorrow at the Trinity Centre in #Bristol for a workshop on Organising for #degrowth: How to improve wellbeing whilst reducing consumption and production With @j-ainsworth.bsky.social from Degrowth London and part of the Bristol Festival of Commoning @cabot-institute.bsky.social

@climeworks.bsky.social gets it.

If scientists from around the world have to pay to access my research in a journal or other paywalled outlet, then so should you. Indeed, you should pay more (and me) since you’re profiteering on my back. arstechnica.com/tech-policy/...

Turns out the world is full of bullies who, underneath it all, are in fact cowardly and fragile little boys. The only way you lose to those bullies is by not showing up for the fight in the first place. www.joearvai.org/all-cup-of-j...

Turns out the world is full of bullies who, underneath it all, are in fact cowardly and fragile little boys. The only way you lose to those bullies is by not showing up for the fight in the first place. www.joearvai.org/all-cup-of-j...

Reading today's news reminded me of something I learned nearly 50 years ago. The memory was so vivid, I decided to write it down. You can read about it here. www.joearvai.org/all-cup-of-j...

Okay, #DOGE, you asked for it so let’s talk about government waste. Can you guess which US industry makes TRILLION$ in profit, but receives HUNDREDS OF BILLION$ in government subsidies — subsidies which economists and policy advisors in your own party agree are a waste of money? Here’s a hint:

Reading today's news reminded me of something I learned nearly 50 years ago. The memory was so vivid, I decided to write it down. You can read about it here. www.joearvai.org/all-cup-of-j...

Okay, #DOGE, you asked for it so let’s talk about government waste. Can you guess which US industry makes TRILLION$ in profit, but receives HUNDREDS OF BILLION$ in government subsidies — subsidies which economists and policy advisors in your own party agree are a waste of money? Here’s a hint:

Los Angeles people: join us 12pm March 7 for a rally for science at the Federal Building in Westwood, and please spread the word to any pro-science folks you know. @standupforscience.bsky.social @latimes.com @ktla.com @abc7.bsky.social @kcrw.com @laist.com @crooked.com @nbcla.com @foxla.bsky.social

Do yourself a favor this morning and check out another beautiful and courageous post by @jailbirdjenna.bsky.social: The People Sing. www.joearvai.org/all-cup-of-j...

Seeing more and more important meetings being cancelled. Also having many speakers from other countries cancelling previously planned visits to and talks in the U.S. As an international scholar working in a field that requires international collaboration, this pains me so much.

“My plea to my academic colleagues in this time is to trust that science’s leaders are making the best judgments they can about how to proceed, remembering that timing can be everything.” www.science.org/doi/10.1126/...

An honest conversation about burnout, creativity, responsibility, empathy, and — of course — science from the brightest nonfiction writer of my generation. Perhaps of any generation. www.nytimes.com/2025/02/22/m...

Welcome to the Bluesky account for Stand Up for Science 2025! Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide! #scienceforall #sciencenotsilence

Terrible timing. Forest Service layoffs and frozen funds increase the risk from wildfires. www.nytimes.com/2025/02/15/c...

I taught my students about rational choices this term, stressing the importance of “continuity”. Sudden and unpredictable shifts in judgments and preferences — which are delinked from clearly defined and articulated objectives — is NOT rational. Capriciousness also strips away credibility and trust.

Excited for you to read a new paper led by Alex Segrè Cohen coming soon in Risk Analysis: "Mapping risks of water injustice and perceptions of privatized drinking water in the United States: A mixed methods approach." Learn more about Alex here: journalism.uoregon.edu/directory/ad...

Times are tough and we, like generations before us, will have to stay alert and fight for what’s just and right. But, keep your chins up, everyone. Science isn’t going anywhere.

Wisdom is everywhere in #LosAngeles. You just need to keep your eyes open.

What makes me tick. www.joearvai.org/all-cup-of-j...