Prof. Katharine Hayhoe

Climate Scientist, Truth-Teller, Christ-Follower
Join me on Bluesky @katharinehayhoe.com
Subscribe to 100% my own 🇨🇦🍁

[Prof. Katharine Hayhoe @KHayhoe]

I don't use X very much any more, but I'd love to see you elsewhere!

For the short & up to date content I used to provide here, see Threads & Bluesky.

For longer commentaries, see LinkedIn & my newsletter.

And for the fun stuff, check out IG + Pinterest.

All links below ⬇️

[Prof. Katharine Hayhoe @KHayhoe]

Looking for more from me than tweets? I regularly share unique content on a dozen other online platforms...and you won't see most of it on Twitter. Browse this thread for direct links and dive in!

[Prof. Katharine Hayhoe @KHayhoe]

Two years after she first guest edited Talking Climate, I sat down with climate scientist Dr. Kim Cobb to ask a simple question: What's the latest?

The answer reminded me that some of the most encouraging climate progress we're seeing is happening at the same time as some of the biggest risks we face.

❤️ What gives her hope: Clean energy. Around the world, renewable energy is being deployed at a pace that even many climate scientists didn't expect to see this soon.

😱 What keeps her up at night: Climate tipping points. Earth's history shows us that climate systems don't always change gradually—and some changes can accelerate much faster than we expect.

🤝 How do we move forward: Talk about it. Research shows that people are more likely to take action when they understand the risks, see solutions happening around them, and know that others care too.

Watch our full conversation on Substack or Patreon, and let me know: What climate solution gives you hope right now?

https://t.co/T2OcVIDoGL

[Institute for Climate and Sustainable Growth @UChiClimate]

“The number one source of uncertainty in the future is us. Our choices are the number one source of uncertainty.”

On our podcast Shocked, @AmyAHarder talks with @KHayhoe about how our choices shape climate outcomes: https://t.co/t7HDttemjV

[UN Environment Programme @UNEP]

The climate crisis is real. So is the progress being made to tackle it.

For #WorldEnvironmentDay, we sat down with two climate scientists to separate fear from fact & unpack the latest science.

The world is moving in the right direction, but we need faster action #NowForClimate: https://t.co/fh1HeyvHmr

[Prof. Katharine Hayhoe @KHayhoe]

What do a giant new marine sanctuary, the loss of climate journalism, and plug-in solar panels for apartment balconies have in common?

They all show how much the future depends on the choices we make today.

🐠 Good News: Papua New Guinea just created the largest marine protected area in its history, safeguarding a stretch of ocean nearly the size of the UK in one of the most biodiverse marine regions on Earth.

😱 Not-So-Good News: NPR's climate desk has been dismantled, and many other major news organizations are doing away with climate reporting altogether. But the climate crisis doesn't go away when we stop covering it.

😎 What You Can Do: If you rent or live in an apartment, check out "balcony solar." And if local regulations are standing in the way? Use your voice to advocate for change. That's how the system changes.

Read more here and, as always, don't forget to use what you learn to start a conversation today! https://t.co/F2u9MudlZk

[Prof. Katharine Hayhoe @KHayhoe]

@liubinskas As I’m one of the main people who popularized her work, I’m very familiar with it. So when I don’t cite Foote - or Fourier or Arrhenius or Tyndall - there is a reason.

Again, if you’d like to know more, you’re welcome to watch the video I made about them all.

[Prof. Katharine Hayhoe @KHayhoe]

If you want my clear, science-based take on what’s happening, why it matters, and - most importantly - what we can do about it, check out my free Talking Climate newsletter.

Why? Because understanding is the first step. Action is the next.

https://t.co/cfzX6HfhJq

[Prof. Katharine Hayhoe @KHayhoe]

I’m a climate scientist. Let me fix this headline.

“Nearly a century ago, scientists showed that burning fossil fuels warms the planet.*

Today, we know human emissions account for over 100% of the warming.**

Yet dark money and disinformation still work to keep Americans addicted to fossil fuels.”***

* in 1937, Guy Callendar published a paper showing that the world had already warmed over the last 50 years due to human emissions what he called “carbonic acid“ – what we now call CO2 – from burning fossil fuels

** If you are wondering, “how could humans be causing more than 100% of the warming?”

— it’s because, according to natural factors, the earth should be cooling right now.

So our emissions are offsetting that cooling AND causing all of the observed warming.

*** For more on the well funded disinformation campaign, read or watch Merchants of Doubt and The Petroleum Papers

[Forbes @Forbes]

Most Americans Aren't Convinced Humans Are Causing Climate Change, New Data Shows
https://t.co/oNdHx1pnMO

[Prof. Katharine Hayhoe @KHayhoe]

@wassilisview already tried that.

[Prof. Katharine Hayhoe @KHayhoe]

@2Patra Thank you! 😊

[Prof. Katharine Hayhoe @KHayhoe]

@pmmcc Thank you! 😊

[Prof. Katharine Hayhoe @KHayhoe]

The world is no longer headed for the most catastrophic futures climate scenarios once warned about: but not because the science was wrong. It’s because people listened, and acted.

That is genuinely good news; but the new scenarios also tell us this:

📈 Not-so-good news - The new climate scenarios cover a narrower future, illustrating how human choices over the last 20 year have closed doors. While highest warming pathways are now less likely thanks to climate action over the last decade, our chances of staying below 1.5C without overshoot are now gone. And in a future where "every bit of warming matters" that means that some previously avoidable suffering will now occur.

🇺🇸 Good news - NPR’s Climate Solutions Week highlights local climate action across the U.S., from tribal wildfire resilience plans in Montana to geothermal heating in Denver and community solar in Portland. Climate solutions are still happening, all around us!

✈️ What you can do - If you’re travelling this summer, fly nonstop when possible, fly economy, take the train if you can, or simply slow down and stay longer in one place. Climate action isn’t only about technology. It’s about the choices we have every day - and share with others to make them contagious!
https://t.co/EtbouYfEcc

[Prof. Katharine Hayhoe @KHayhoe]

@Carl0vj3 @Freelander27 Carl chose option B and confirmed he's sea-lioning .. with a huge side dish of arrogance, imagining he knows better than a climate scientist and they have never heard of this common myth or reviewed those papers decades ago. This is why I block.

[Prof. Katharine Hayhoe @KHayhoe]

@medialens Best to send via email, please! I only visit X about once every few months and am signing off now until oh probably August 😄 https://t.co/ICPV4Vz3au

[Prof. Katharine Hayhoe @KHayhoe]

@SimonJBroddle No integrity, just a pivot to ad hominems - that's the mark of a troll.

[Prof. Katharine Hayhoe @KHayhoe]

@misterduncan This is why I am on X about once every six months. I invite you to follow me elsewhere if you'd like more regular content!

[Prof. Katharine Hayhoe @KHayhoe]

I'm offering you the thread one more time on the 0.1% chance you pay for a blue check yet somehow don't know what a thread is.

However, there is a 99.9% chance that you are sea-lioning. This is a type of trolling that involves asking seemingly innocent questions but refusing to listen to the answers -- and we will be able to tell if you are, by your response to this post.

If you use the resources in the thread to answer your questions, you're not

If you ignore them and continues to try to provoke an argument with me or others here, you are a sea lion - and you'll be blocked.

Let's see.

[Prof. Katharine Hayhoe @KHayhoe]

The technique I recommend - which is 99% accurate in identifying sea lioning, which is what this looks like - is simply providing a link to a resource (often, Skeptical Science) that addresses their question.

If they are genuine, they'll click and read it.

If they are not, they literally cannot click. They'll ignore it, ridicule it, provoke you: but they will not click.

That's a sign that you are wasting your time.

[Prof. Katharine Hayhoe @KHayhoe]

@MaggieDupree @medialens that is a good idea. Thank you Maggie!