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Hannah Ritchie

@hannahritchie.bsky.social

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

281 Posts65743 Follower153 Folgt
Hannah Ritchie@hannahritchie.bsky.social · 6mo ago

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...

Book giveaway for Clearing the Air: A Hopeful Guide to Solving Climate Change in 50 Questions and Answers by Hannah Ritchie Jan 23-Feb 06, 2026

Enter 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 ...

goodreads.com

Hannah Ritchie@hannahritchie.bsky.social · 8mo ago

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.
Andrew Dessler@andrewdessler.com · 8mo ago

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).

NPR@npr.org · 8mo ago

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

Our World in Data@ourworldindata.org · 9mo ago

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.
Lauri Myllyvirta@laurimyllyvirta.bsky.social · 9mo ago

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.

Centre for Research on Energy and Clean Air@creacleanair.bsky.social · 9mo ago

🇨🇳 NEW | Experts think #China can exceed its new 2035 #NDCs, but are less certain about short-term #emissions cuts Full China Climate Transition Outlook 2025 survey: energyandcleanair.org/publication/chinas-climate-transition-outlook-2025-expert-survey/ w/ @belindaschaepe.bsky.social; Xunpeng Shi

David Ho@davidho.bsky.social · 9mo ago

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.
David Ho@davidho.bsky.social · 11mo ago

Having AI crammed down our throats is bullshit, but machine learning has some real uses in science. This awesome page shows experimental cyclone track forecasts from Google DeepMind and Google Research's AI weather models, along with forecasts from ECMWF. 😍 deepmind.google.com/science/weat...

A dark-themed weather tracking map from Google Weather Lab: Cyclones (Preview) showing hurricane/cyclone models in the Atlantic Ocean as of Friday, September 19, 2025, at 08:00. The map includes ensemble forecast tracks and storm markers extending from the mid-Atlantic toward Western Europe. Multiple colorful lines (green, orange, blue, purple, yellow) represent different storm model ensembles and possible tracks, with clusters of paths pointing toward Ireland, the United Kingdom, France, Spain, and Portugal. The cyclone originated east of the Caribbean, with its projected paths fanning northeastward across the Atlantic. Colored circles mark storm intensity along the tracks, numbered (e.g., 1, 2, 6) corresponding to categories. A second storm is visible off the Pacific coast of Mexico with clustered ensemble markers. The left panel lists model options (Observed, Our experimental model, WeatherNext Gen, WeatherNext Graph, ECMWF ENS, ECMWF HRES), a legend for storm markers, tracks, ensemble tracks, cones, and wind speed colors. At the bottom, sliders indicate initialization time (Fri, Sep 19, 2025, 08:00) and lead time (+6 days, Fri, Sep 26, 2025, 02:00). The background map highlights North America, the Atlantic Ocean, Western Europe, and parts of Africa.
Hannah Ritchie@hannahritchie.bsky.social · 9mo ago

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...

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.

sustainabilitybynumbers.com

Lauri Myllyvirta@laurimyllyvirta.bsky.social · 10mo ago

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.

Bild
Jenny Chase@solarchase.bsky.social · 10mo ago

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/...

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

theguardian.com

Patrick Reynolds for a greater Auckland@patrickreynolds.bsky.social · 10mo ago

Not nearly enough is made of the incredibly impressive feat Indian Railways has made to electrify almost 100% of its 135,000km of track, while also growing renewable sourcing. Huge: timesofindia.indiatimes.com/business/ind...

Indian Railways to achieve net zero targets in 2025 itself - 5 years ahead of 2030 goal - Times of India

India Business News: Indian Railways is set to achieve net-zero targets by year-end, surpassing its 2030 goal through extensive electrification. Aiming for 95% electric tr

timesofindia.indiatimes.com

Josiah Mortimer@josiahmortimer.bsky.social · 10mo ago

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.

Hannah Ritchie@hannahritchie.bsky.social · 11mo ago

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® 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.

drawdown.org