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Hannah Ritchie

@hannahritchie.bsky.social

153 Following67.3k Followers

Deputy Editor, Our World in Data Senior Researcher, University of Oxford Climate, energy, environment, all things data.

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@hannahritchie.bsky.socialJan 23, 2026, 2:34 PM

My new book — Clearing the Air — comes out in the US on February 19th 📚

Goodreads is running a giveaway, in case you want to enter and have a chance of getting a free copy!

@mitpress.bsky.social

www.goodreads.com/giveaway/sho...

goodreads.comBook giveaway for Clearing the Air: A Hopeful Guide to Solving Climate Change in 50 Questions and Answers by Hannah Ritchie Jan 23-Feb 06, 2026Enter to win one of 5 free copies available. Giveaway dates from Jan 23-Feb 06, 2026. We can’t afford to delay climate action, but with all the shouting ...
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@hannahritchie.bsky.socialDec 22, 2025, 6:22 AM

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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@hannahritchie.bsky.socialDec 12, 2025, 2:47 PM

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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@akshatrathi.bsky.socialDec 9, 2025, 10:51 AMReposted by @hannahritchie.bsky.social

The relentless march of ever-falling battery prices continues.

🎁🔗 www.bloomberg.com/news/article...

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@hannahritchie.bsky.socialDec 9, 2025, 8:29 AM

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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@hannahritchie.bsky.socialDec 5, 2025, 1:52 PM

Here is the report from CREA too: energyandcleanair.org/publication/...

energyandcleanair.orgChina’s Climate Transition: Outlook 2025 – Centre for Research on Energy and Clean Air
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@hannahritchie.bsky.socialDec 5, 2025, 1:52 PM

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.comWhat 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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@jaapburger.euDec 3, 2025, 6:55 PMReposted by @hannahritchie.bsky.social

As of today, there are more electric cars than diesel cars in Norway.

elbil.noFlere elbiler enn dieselbiler i Norge3. desember er en merkedag i norsk bilhistorie: Nå er elbil den mest vanlige personbil-typen på veiene i Norge.
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@hannahritchie.bsky.socialDec 3, 2025, 6:11 PM

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

@hannahritchie.bsky.socialDec 3, 2025, 6:06 PM

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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@hannahritchie.bsky.socialDec 3, 2025, 4:37 PM

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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@hannahritchie.bsky.socialDec 3, 2025, 4:24 PM

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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@hannahritchie.bsky.socialDec 3, 2025, 4:19 PM

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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@hannahritchie.bsky.socialDec 3, 2025, 4:18 PM

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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@andrewdessler.comNov 30, 2025, 5:55 AMReposted by @hannahritchie.bsky.social

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).

NNPR@npr.orgNov 30, 2025, 3:26 AM

Meteorologists are surprised that the weather model that did the best job forecasting hurricanes this year was a new one, introduced by Google. AI may be the beginning of a new era of forecasting. n.pr/49MFa1M

n.prAs the 2025 Atlantic hurricane season ends, the future of forecasting is AIMeteorologists are surprised that the weather model that did the best job forecasting hurricanes this year was a new one, introduced by Google. AI may be the beginning of a new era of forecasting.
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@robbieandrew.bsky.socialNov 25, 2025, 1:53 PMReposted by @hannahritchie.bsky.social

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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@ourworldindata.orgNov 17, 2025, 11:24 AMReposted by @hannahritchie.bsky.social

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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@hannahritchie.bsky.socialNov 17, 2025, 2:21 PM

How are you not laughing the entire way?

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@hannahritchie.bsky.socialNov 14, 2025, 8:26 PM

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”

@hannahritchie.bsky.socialNov 14, 2025, 8:23 PM

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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