Prof. Katharine Hayhoe Profile picture
Climate Scientist, Chief Scientist @nature_org, Prof @TexasTech, Champion of the Earth @UN, Climate Ambassador @WEAnews, Mom @joinsciencemoms. Tweets 100% mine.
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Jun 30 6 tweets 2 min read
Today's SCOTUS ruling on EPA vs W Va makes it even harder to address the climate crisis at a time when we need to be doing all we can. (short thread)… "Climate change is the greatest global health threat facing the world in the 21st century, but it is also the greatest opportunity to redefine the social and environmental determinants of health." @TheLancet…
Jun 29 4 tweets 2 min read
My 3 steps to a constructive conversation about climate...and other contentious issues too:
BOND by beginning with what you have in common, not what divides you.
CONNECT the issue to what you both care about.
INSPIRE with +ve, constructive solutions they can get on board with. It's important to note, however, that a small percentage are dismissive, which means these 3 steps don't apply. Why not? Because it's impossible to have a constructive conversation with someone who refuses to engage in good faith. For them, I say:
Jun 20 8 tweets 3 min read
Scaring, guilting and/or shaming individuals is commonly perceived to be the most effective way to motivate them to engage in climate action here on Twitter. But as I explain here, such approaches backfire more often than they succeed.… Because most people self-silence on climate change, we usually think of people as falling into two categories ... a small group of people like me who are worried, and everyone else who is not.
Jun 19 15 tweets 5 min read
Climate change is no longer a future issue or a distant one. Wherever we live, it's affecting our lives here + now. One of the biggest ways is thru global weirding: loading the weather dice against us. And this summer, it's happening EVERYWHERE. (thread) Hotter, drier conditions are causing wildfires across western North America to burn greater and greater areas. In May and June New Mexico experienced the two largest wildfires in its history, exacerbated by severe heat and wind.…
Jun 16 5 tweets 2 min read
Climate action in 3 steps:
1. Reduce everything we can, as much as we can, first.
2. Offset the rest (which is impossible to do if we don't reduce everything we can first).
3. Build resilience to the impacts we can no longer avoid.
Why? Because the only other choice is suffering. For more, see:…
May 23 7 tweets 3 min read
The more I read or hear from large banks, the financial engines of our economy, the more worried I am that they will not act until their own demise is already assured--along with the rest of the economy that they power. Exhibit A, from this week. (thread)… Miami is built on porous limestone so "building a [Amsterdam-like] dike on porous limestone is like putting a fence on top of a tunnel: it alters the route of travel, but not necessarily the amount." Put up a dike & water just bubbles up on the other side.…
Apr 27 7 tweets 2 min read
Two of the most common misconceptions I hear from people who want to inspire others to fix climate change: 1/ I need to make them care about X in order to care about climate change, and 2/ we need to fix X before we fix climate change. But we don't have time for either of these. Instead, help people see *who they are is already the perfect person to care*. You might care because you love nature; they might care because they want a safe place to live. You, because you live in a polluted city. Them, because they fish. We all have different reasons to care.
Apr 15 9 tweets 3 min read
Wrote this Global Weirding episode a few years ago but feel it is even more relevant today than it was then. As I talk about in chapter 6 here, fear wakes us up and alerts us to the existence of a problem. But if we don't know what to do about it, then "Fear and anxiety will cause us to withdraw, to freeze, to give up, rather than take action." -Tali Sharot…
Apr 13 5 tweets 2 min read
So interesting to chat with @sbjorkjames and @Barla_Josef for a special issue of the Feminist Review. They titled our chat, "A Climate of Misogyny: Gender, Politics of Ignorance, and Climate Change Denial". A few highlights below as it's paywalled.… On women in science: "We used to have 2 cats. At the bowl, the male would put his paw on the head of the female and hold her head down on the ground while he ate first. He slept at the head of the bed, she slept at the foot if she knew what was good for her. We are the 2nd cat."
Apr 2 11 tweets 4 min read
"There should be some magical form of energy that has zero impacts and until we get there, we should just keep using fossil fuels." This is just the latest variant on climate denial zombie argument #4, "the cure is worse than the disease".… (Of course there's no free energy lunch: there is a very expensive one that will cost us human civilization as we know it, and a much more affordable on that will preserve human civilization but of course we need to keep working at making even more affordable than it is today.)
Mar 28 6 tweets 2 min read
In which yet another leading scientist has to spend his time debunking ongoing zombie myths perpetuated by non-experts in their ongoing attempt to continue to delay climate action by using denial strategy #3, "it's not bad". The full list of strategies is ... 1/ It's not happening
2/ It's not human-caused
3/ It's not bad
4/ It's too expensive/hard to fix; better/cheaper to adapt
5/ It's too late, you really should have warned us earlier

There are many variants, but in my experience they all fall into one of those 5 categories.
Mar 6 4 tweets 2 min read
"The real lesson from the battlefields of Ukraine is that Britain [fill in your country's name here] needs to rid itself of its fossil fuel addiction entirely and become self-reliant on electricity that is generated cleanly and efficiently."… Talking to an expert who studies the oil & gas economy the other day, he told me that a country can never be energy independent while depending on fossil fuels, even if their production = consumption, since they are still tied to OPEC and the global market.
Feb 9 4 tweets 2 min read
Two reasons why today's news is one piece of buckshot but no silver bullet for the climate crisis: 1. From "proof of concept" to demo plant to global implementation takes decades. 2. Only 25% of GHG emissions come from electricity & heat production.… As @ProjectDrawdown shows, there is no single silver bullet. Instead, there's a plethora of "silver buckshot" solutions, from modifying human behaviour to efficiency to smart ag & land mgmt to bleeding-edge new tech like fusion. We need them ALL.
Jan 30 6 tweets 3 min read
The responses to this tweet display many of the fallacies we fall into when we don't apply critical thinking. "My family didn't get asthma so these results are false" or, "I love gas, so you're wrong," or "Where did the data come from?" (they didn't read the article). People also point out, correctly, that this is a first-world issue. In low-income countries, women & children are often disproportionately exposed to deadly indoor air pollution as they cook over an open fire. That's why efforts like this are essential.
Jan 28 4 tweets 2 min read
In the US, 70% of people are worried about climate change but only 8% are activated. Sowing uncertainty is a technique that's been used for decades to keep that gap as big as possible: "if we aren't 100% sure, best to wait." Here's the most recent example.… It's important to recognize that science denial is just a smokescreen. No one really questions 200 years of physics: if they did, they wouldn't be using stoves, fridges or airplanes either. The real problem is solution aversion. Watch:
Jan 12 4 tweets 2 min read
"I chose this life to help build a better world for you. Climate is changing so fast, and will affect your world so much, I’ve had to become your ‘gladiator science’ mama so I can fight every day – for you.” @DeepBlueSeaNext… And if you're not a parent, of course you have every reason to care about climate, too! It's not a zero sum game: we need everyone to lean into whatever their passion is & show others who care about the same thing that they're also the perfect person to act on climate.
Jan 1 4 tweets 1 min read
But do not rage against those who are advocating, like you are, for climate action. We are all in this together. The saddest trend of 2021 for me was the exponential rise in attacks from those who are panicked about climate change and decide to turn on each other. It used to be that 100% of my online trolls were climate dismissives. Now, it's down to 90% and dropping fast.
Dec 9, 2021 7 tweets 2 min read
This is great news, but once again: climate 👏 change 👏 is 👏not 👏a 👏religion. When we use the word "believe" we subconsciously perpetuate this misconception and the implication that people have to choose between the religion of global warming versus another. Exhibit A.
Nov 17, 2021 8 tweets 3 min read
Devastating flooding across Vancouver & nearby areas that endured record heat & wildfires earlier this year. As climate change loads the weather dice against us, atmospheric rivers dump more rain, heatwaves are more intense, wildfires burn more area...and people suffer. Climate change affects the safety of our homes, the air we breathe, the food we eat and everything we depend on for our health, and well-being, and life. That's why ...
Nov 5, 2021 6 tweets 4 min read
There's a lot going on at #COP26 and much of it is being live-streamed! Here's where you can find live streams of all the hundreds of "side events" each day inside the Blue Zone:… and see below for some of the events I'm participating in. I spoke at one of the @TEDCountdown events this evening
Oct 21, 2021 6 tweets 4 min read
Huge congrats to the amazing @ayanaeliza winner of the 2021 Stephen Schneider Climate Communication Award!… Check out her TED talk here:…