iiinova — where your digital self keeps evolving

Hannah Ritchie @hannahritchie.bsky.social · 22/12/2025

If you’re looking for some holiday reading, my new book — Clearing the Air — is on offer at £1.99 on Kindle for the next 24 hours. Hope you enjoy! www.amazon.co.uk/Clearing-Air...

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Hannah Ritchie @hannahritchie.bsky.social · 12/12/2025

Thank you, Dave! Really appreciate you following along. That's very generous. Yes, Our World in Data is a non-profit, and donations really mean a lot. I am biased, but my teammates really do great work, and I learn a lot from them. That also supports my writing elsewhere.

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Akshat Rathi @akshatrathi.bsky.social · 09/12/2025

The relentless march of ever-falling battery prices continues. 🎁🔗 www.bloomberg.com/news/article...

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Hannah Ritchie @hannahritchie.bsky.social · 09/12/2025

The Warming Stripes have been an iconic way to communicate temperature data. On the latest episode of the podcast, we got to speak to their creator, @edhawkins.org. As a fellow data viz nerd, this was a fun one. The latest episode of our podcast: podcasts.apple.com/gb/podcast/p...

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Hannah Ritchie @hannahritchie.bsky.social · 05/12/2025

What happened on energy and climate in China this year? A summary of the data, mostly drawing on the latest report from Centre for Research on Energy and Clean Air (by @laurimyllyvirta.bsky.social & team). My latest Substack: www.sustainabilitybynumbers.com/p/chinese-em...

sustainabilitybynumbers.com

What happened on energy and climate in China this year?

Emissions flatlined; clean power pushed out coal; and oil for transport falls again.

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Hannah Ritchie @hannahritchie.bsky.social · 03/12/2025

In high school, only 2 other girls in my year chose physics as their science subject. Most girls chose chem or biology. Climate obv involves chem, but probably more physics. In uni, there were very few other women in engineering courses. Chem eng was more popular, but not many in civil, electrical

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Hannah Ritchie @hannahritchie.bsky.social · 03/12/2025

Thank you! Less sure about climate science (probably because it’s quite physics-based, and of the 3 sciences that skews more male?) The energy field has a strong focus on engineering and construction, which again, are more male-dominated. I think this has been slowly changing.

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Hannah Ritchie @hannahritchie.bsky.social · 03/12/2025

When people see me working with headphones on, they probably assume I'm listening to calming classical or focus music. In reality, I'm blaring rap and grime.

My top genres from Spotify:

1. Pop Rap
2. Grime
3. EDM
4. Indie
5. Indie Folk

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Hannah Ritchie @hannahritchie.bsky.social · 03/12/2025

At a few book events, I've been asked why individuals should care much about their own personal actions on climate when Taylor Swift flies around in her private jet all the time (this was at the height of her tour). Funnily enough, she is the most-listened to artist among my audiobook listeners 😄

Top artists:

1) Taylor Swift
2) Bad Bunny
3) Olivia Dean

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Hannah Ritchie @hannahritchie.bsky.social · 03/12/2025

I remember looking at demographic data of my followers on Twitter/X a few years ago, and it was very male-skewed (80/20, if I remember rightly). Interesting to see the differences for my audiobooks.

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Hannah Ritchie @hannahritchie.bsky.social · 03/12/2025

Just discovered that Spotify does a "Wrapped for Authors" on their audiobook demographics for the year. Fun! In my experience, climate/energy stuff is usually quite male-skewed, but I was pleasantly surprised to see that my book listeners weren't skewed *that* much!

Pie chart showing that 54% of listeners were male; 42% female; 3% non-specified, and 1% non-binary.

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Andrew Dessler @andrewdessler.com · 30/11/2025

This is a legitimate scientific revolution in meteorology. Also, to be clear, these models are not the AI LLMs that most people are familiar with. They are machine learning algorithms trained on observations (actually reanalysis).

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Robbie Andrew @robbieandrew.bsky.social · 25/11/2025

The Nepalese EV transition. In simple terms, brown on this graph is India's share and blue is China's share. The trigger? India effectively halted all imports of petroleum into Nepal in 2015, an "undeclared blockade", which was "masked as constitutional concern". robbieandrew.github.io/carsales/

Graph showing: Nepalese passenger car imports by type: Monthly

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Our World in Data @ourworldindata.org · 17/11/2025

In the last decades, the world has made fantastic progress against extreme poverty. In 1990, 2.3 billion people lived in extreme poverty. Since then, the number of extremely poor people has declined by 1.5 *billion* people. 🧵

A stacked area chart showing the total population (split by World Bank region) living in extreme poverty, defined as living below the International Poverty Line of $3 per day. Shown from 1990 to 2025, with World Bank projections from 2026–2040. The data is adjusted for inflation and cost of living differences.

Rapid progress against extreme poverty in recent decades has slowed and is projected to end.

In 1990, 2.3 billion people lived in extreme poverty. Since then, the number of extremely poor people has declined by 1.5 billion people.

The number of people in extreme poverty is projected to decline, from 831 million people in 2025 to 793 million people in 2030. After 2030, the number of extremely poor people is expected to increase.

The data source is Lakner et al (2024), updated using the World Bank PIP (2025). The chart is licensded CC BY to Our World in Data.

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Hannah Ritchie @hannahritchie.bsky.social · 17/11/2025

How are you not laughing the entire way?

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Hannah Ritchie @hannahritchie.bsky.social · 14/11/2025

Still I think the next first year of falling emissions outside of some crisis (e.g. COVID) is important to wave as a flag of “emissions are down, we can’t let them go back up again. Let‘s get a move on”

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Hannah Ritchie @hannahritchie.bsky.social · 14/11/2025

The first year of falling global emissions after the peak (whenever that is) will probably also be fairly small, and within the bounds of uncertainty in emission estimates. So you‘d probably want multiple years of data to be confident.

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Hannah Ritchie @hannahritchie.bsky.social · 14/11/2025

I still think that is possible, but 🤷🏼‍♀️ I also agree with Glen that you’d only confidently know that it was the peak in 2028 or 2029 or something, if emissions had continued to fall multiple years in a row (+ signs that the decline is structural)

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Hannah Ritchie @hannahritchie.bsky.social · 12/11/2025

I took the historical data from here: www.iea.org/data-and-sta... Notes say it is DC. 2024 figures roughly align with IEA’s “average additions to 2035 are 540 GW, which is similar to levels in 2024”

iea.org

Renewable Energy Progress Tracker – Data Tools - IEA

Renewable Energy Progress Tracker - Data tools. A data tool by the International Energy Agency.

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Hannah Ritchie @hannahritchie.bsky.social · 12/11/2025

Agreed they will slow and eventually stop growing, but I am doubtful we are there now (at a global level).

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Hannah Ritchie @hannahritchie.bsky.social · 12/11/2025

The red line is how much solar PV has actually been added globally each year, up to 2024. Black line represents the IEA's assumptions of how much solar will be added each year, to 2035, in its "Current Policies Scenario". Basically, solar has been growing strongly, but it assumes this growth stops.

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Hannah Ritchie @hannahritchie.bsky.social · 12/11/2025

It's worth reiterating that the IEA are quite explicit that this is not a "business-as-usual" scenario. They try to explain what it does and does not represent here: www.iea.org/commentaries... Scenarios are useful for testing assumptions. The problem is that nuance is often lost in translation.

iea.org

Scenarios in the World Energy Outlook 2025 – Analysis - IEA

Scenarios in the World Energy Outlook 2025 - A commentary by Laura Cozzi, Tim Gould

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Hannah Ritchie @hannahritchie.bsky.social · 12/11/2025

This is a simple chart based on the Current Policies Scenario assumption that "Annual solar PV capacity additions average 540 gigawatts to 2035, similar to the level in 2024." www.iea.org/reports/worl...

iea.org

Current Policies Scenario – World Energy Outlook 2025 – Analysis - IEA

World Energy Outlook 2025 - Analysis and key findings. A report by the International Energy Agency.

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Hannah Ritchie @hannahritchie.bsky.social · 12/11/2025

Good thread from Dave about the new IEA "Current Policies Scenario" making a lot of the headlines. Here is a very quick mock-up I made of what this scenario assumes for solar PV additions through to 2035, with historical context. I'll let you decide whether this seems likely.

Line chart showing global solar PV additions rising steeply to 2025, then flattening at about 540 GW per year through 2035, reflecting the IEA’s Current Policies Scenario.

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Hannah Ritchie @hannahritchie.bsky.social · 11/11/2025

RIP Quentin Wilson. A great communicator and advocate for electrified transport. His calm way of calling out misinformation and trying to cross the divide will be sorely missed. A nice tribute video from: @bobbyllew.bsky.social youtu.be/NlTalT3faSM?...

youtu.be

'Top Tier': Robert & Dan pay tribute to Quentin Willson. Gone too soon, never forgotten.

YouTube video by Everything Electric CARS

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Lauri Myllyvirta @laurimyllyvirta.bsky.social · 06/11/2025

China's new climate targets made it clear that policymakers are still leaving the door open to a rebound in emissions in the next few years, despite a recent falling trend and clean energy growth rates that will keep emissions falling if sustained.

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Hannah Ritchie @hannahritchie.bsky.social · 30/10/2025

Yes, that could be the case. Although I'd guess it's a bigger problem for the self-reported height and weights they use for BMI in the article. They do mention this.

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Hannah Ritchie @hannahritchie.bsky.social · 30/10/2025

In a new Gallup poll in the US, 12.4% of adults said that they'd taken GLP-1 drugs for weight loss. 15% in women, and 9% in men. I'd have guessed half as much, but I guess I'm a year behind the times. news.gallup.com/poll/696599/...

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David Ho @davidho.bsky.social · 28/10/2025

The ensemble mean of Google DeepMind's experimental machine learning weather model had Hurricane Melissa hitting Jamaica 7 days out. That's very impressive.

A screenshot from Google Weather Lab: Cyclones (Preview) showing ensemble model forecasts for a tropical cyclone in the Caribbean region. The map background is dark, with landmasses labeled in gray, including Cuba, Jamaica, Hispaniola (Haiti and the Dominican Republic), Puerto Rico, and parts of Central America. Numerous thin blue lines indicate ensemble forecast tracks from the ECMWF HRES model, spreading from the southwestern Caribbean Sea northward and northeastward across Jamaica, Cuba, Haiti, the Turks and Caicos Islands, and into the Atlantic Ocean east of the Bahamas. A circular blue marker labeled “2” indicates the storm’s position northeast of Hispaniola, corresponding to a Category 2 hurricane intensity. The left panel displays model and observation options, with ECMWF HRES selected, along with storm markers, ensemble markers, tracks, ensemble tracks, cones, and wind speed colors. The bottom panel shows an initialization time of Wednesday, October 22, 2025, 07:00, and a lead time of 8 days 6 hours (Thursday, October 30, 2025, 12:00). The visualization indicates forecast uncertainty and potential paths of the storm through the Caribbean and toward the western Atlantic.

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Hannah Ritchie @hannahritchie.bsky.social · 28/10/2025

One area where AI has a lot of potential is in weather forecasting and climate modelling. Fairly accurate weather forecasting, in particular, is something that many of us now take for granted. From my latest Substack: www.sustainabilitybynumbers.com/p/artificial...

sustainabilitybynumbers.com

Artificial intelligence could dramatically improve weather forecasting

An AI-based model outperformed every other in forecasting the Indian monsoon this year. This helped millions of farmers.

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Hannah Ritchie @hannahritchie.bsky.social · 20/10/2025

My favourite event of the year 🧵👇

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Lauri Myllyvirta @laurimyllyvirta.bsky.social · 20/10/2025

Big China electricity&industial data update🧵for September: ➡️Power generation from coal and gas dropped 5%, for a 1.2% fall in the first nine months of the year. ➡️Crude steel production fell by 5% and cement output by 9% in Sep, accelerating from 3% and 5% drops year-to-date.

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Hannah Ritchie @hannahritchie.bsky.social · 13/10/2025

Thank you for reading, Franck! And for the extremely detailed notes.

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Hannah Ritchie @hannahritchie.bsky.social · 13/10/2025

On November 4th I'll be in London at the How To Academy, discussing and answering question about solutions to climate change, and how they stack up. If you're interested in coming along, you can find details here: howtoacademy.com/events/how-t...

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Jenny Chase @solarchase.bsky.social · 08/10/2025

This article is just bollocks, isn't it? There are lots of good reasons not to eat many Doritos, but the carbon footprint of the corn going into them isn't one of them, because eating almost anything else would be worse. www.theguardian.com/environment/...

theguardian.com

The hidden cost of ultra-processed foods on the environment: ‘The whole industry should pay’

Industrially made foods involve several ingredients and processes to put together, making it difficult to examine their true cost

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Our World in Data @ourworldindata.org · 07/10/2025

Does the news reflect what we die from?

The image presents a comparison of the leading causes of death in the United States for 2023 and the media coverage these causes receive from three news outlets: The New York Times, The Washington Post, and Fox News.

In the footer, it notes the data sources, indicating that the information is based on media mentions from Media Cloud (2025) and death data from the US CDC (2025) and the Global Terrorism Index, with a clarification that values are normalized to sum to 100%.

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Dave Jones @cleanpowerdave.bsky.social · 07/10/2025

NEW: GLOBAL RENEWABLES OVERTAKES COAL How the heck did that happen so quickly?!...🧵

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Josiah Mortimer @josiahmortimer.bsky.social · 30/09/2025

Some good news. London is meeting legal limits for toxic NO2 pollution for the first time – almost 200 years earlier than predicted – following the Mayor’s "world leading air pollution policies," City Hall announces. The Ultra Low Emissions Zone - and similar policies - really do work.

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Hannah Ritchie @hannahritchie.bsky.social · 30/09/2025

Thank you very much, Dan. I'm really glad you're enjoying it.

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Hannah Ritchie @hannahritchie.bsky.social · 29/09/2025

I am biased, but a great combination I think. Enjoy!

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Hannah Ritchie @hannahritchie.bsky.social · 23/09/2025

Many people feel overwhelmed with the number of potential climate solutions, and are not quite sure what to focus on. @projectdrawdown.bsky.social has always been at helping people navigate the minefield. Their new explorer is really cool, and helps to make things clearer: drawdown.org/explorer

drawdown.org

Drawdown® Explorer

We know what we need to do: stop climate change as quickly as possible. Now, with the Drawdown Explorer, we know how to do it.

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Hannah Ritchie @hannahritchie.bsky.social · 23/09/2025

What impact do contrails from aviation have on global warming? Is there a cheap and easy way to get rid of them? There might be. In the latest episode of Solving for Climate we speak with Ian McKay, founder of Orca Sciences about this and much more. Listen here: open.spotify.com/episode/4aMv...

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Hannah Ritchie @hannahritchie.bsky.social · 22/09/2025

Thanks, Nick. I meant there is no universal vaccine that exists for many other infectious diseases — especially for first infection. But agree that wasn't clear, and I've updated the article now to give a bit more context. Thanks for flagging. I think Qdenga is also now recommended for 6-16yo.

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