Hannah Ritchie
@hannahritchie.bsky.social
Deputy Editor, Our World in Data
Senior Researcher, University of Oxford
Climate, energy, environment, all things data.
Senior Researcher, University of Oxford
Climate, energy, environment, all things data.
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.
They do mention this.
October 30, 2025 at 6:19 PM
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.
They do mention this.
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/...
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/...
October 30, 2025 at 6:02 PM
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/...
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/...
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...
If you're interested in coming along, you can find details here:
howtoacademy.com/events/how-t...
October 13, 2025 at 4:54 PM
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...
If you're interested in coming along, you can find details here:
howtoacademy.com/events/how-t...
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...
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...
September 23, 2025 at 4:19 AM
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...
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...
Next book on the reading list 📚
September 19, 2025 at 6:48 AM
Next book on the reading list 📚
He would like everyone to know that his outdoor feline friends kill far more birds than wind turbines.
September 18, 2025 at 11:07 AM
He would like everyone to know that his outdoor feline friends kill far more birds than wind turbines.
September 18, 2025 at 11:07 AM
A decade of change.
In 2014, less than 4% of the world's electricity came from solar and wind. In 2024, this was 15%.
Here's how the distribution across countries has changed (+ shifted upwards) over those 10 years.
Data from @ember-energy.org
In 2014, less than 4% of the world's electricity came from solar and wind. In 2024, this was 15%.
Here's how the distribution across countries has changed (+ shifted upwards) over those 10 years.
Data from @ember-energy.org
September 17, 2025 at 1:25 PM
A decade of change.
In 2014, less than 4% of the world's electricity came from solar and wind. In 2024, this was 15%.
Here's how the distribution across countries has changed (+ shifted upwards) over those 10 years.
Data from @ember-energy.org
In 2014, less than 4% of the world's electricity came from solar and wind. In 2024, this was 15%.
Here's how the distribution across countries has changed (+ shifted upwards) over those 10 years.
Data from @ember-energy.org
Cement is responsible for around 7-8% of carbon emissions.
How do we decarbonise it?
This week on Solving for Climate we talk to Leah Ellis, CEO of Sublime Systems, about how we might solve for low-carbon cement.
Listen here:
open.spotify.com/episode/3PXb...
How do we decarbonise it?
This week on Solving for Climate we talk to Leah Ellis, CEO of Sublime Systems, about how we might solve for low-carbon cement.
Listen here:
open.spotify.com/episode/3PXb...
September 16, 2025 at 4:58 AM
Cement is responsible for around 7-8% of carbon emissions.
How do we decarbonise it?
This week on Solving for Climate we talk to Leah Ellis, CEO of Sublime Systems, about how we might solve for low-carbon cement.
Listen here:
open.spotify.com/episode/3PXb...
How do we decarbonise it?
This week on Solving for Climate we talk to Leah Ellis, CEO of Sublime Systems, about how we might solve for low-carbon cement.
Listen here:
open.spotify.com/episode/3PXb...
Where is China in the energy transition?
In our latest episode of Solving for Climate we chat with @laurimyllyvirta.bsky.social about all things China and climate.
Listen here: open.spotify.com/episode/1FFO...
In our latest episode of Solving for Climate we chat with @laurimyllyvirta.bsky.social about all things China and climate.
Listen here: open.spotify.com/episode/1FFO...
September 9, 2025 at 5:14 AM
Where is China in the energy transition?
In our latest episode of Solving for Climate we chat with @laurimyllyvirta.bsky.social about all things China and climate.
Listen here: open.spotify.com/episode/1FFO...
In our latest episode of Solving for Climate we chat with @laurimyllyvirta.bsky.social about all things China and climate.
Listen here: open.spotify.com/episode/1FFO...
Solar power is taking off quickly in Hungary ☀️⚡️
Our latest data insight: ourworldindata.org/data-insight...
Our latest data insight: ourworldindata.org/data-insight...
September 1, 2025 at 4:32 PM
Solar power is taking off quickly in Hungary ☀️⚡️
Our latest data insight: ourworldindata.org/data-insight...
Our latest data insight: ourworldindata.org/data-insight...
In a few weeks (Saturday 6th September), Greg Jackson and I will be speaking with Pilita Clark at the FT Weekend Festival.
Do come along if you're interested in clean energy, climate change (and many other interesting talks at the festival!).
ukftweekendfestival.live.ft.com
Do come along if you're interested in clean energy, climate change (and many other interesting talks at the festival!).
ukftweekendfestival.live.ft.com
August 26, 2025 at 3:09 PM
In a few weeks (Saturday 6th September), Greg Jackson and I will be speaking with Pilita Clark at the FT Weekend Festival.
Do come along if you're interested in clean energy, climate change (and many other interesting talks at the festival!).
ukftweekendfestival.live.ft.com
Do come along if you're interested in clean energy, climate change (and many other interesting talks at the festival!).
ukftweekendfestival.live.ft.com
August 26, 2025 at 9:34 AM
A key challenge for data centres/AI is that they are very geographically concentrated. See this chart from the IEA.
Even if data centres are "just" 1-2% of global electricity, if you're adding a reasonable amount quickly, the local grids serving this demand are going to struggle.
Even if data centres are "just" 1-2% of global electricity, if you're adding a reasonable amount quickly, the local grids serving this demand are going to struggle.
August 26, 2025 at 9:31 AM
A key challenge for data centres/AI is that they are very geographically concentrated. See this chart from the IEA.
Even if data centres are "just" 1-2% of global electricity, if you're adding a reasonable amount quickly, the local grids serving this demand are going to struggle.
Even if data centres are "just" 1-2% of global electricity, if you're adding a reasonable amount quickly, the local grids serving this demand are going to struggle.
The UK has also had a large year for wildfires:
August 22, 2025 at 11:32 AM
The UK has also had a large year for wildfires:
Our @ourworldindata.org we visualise weekly updates of wildfire data from the Global Wildfire Information System.
Spain was having a pretty low/average year until the past few weeks when it went roaring past previous years.
You can track this data here:
ourworldindata.org/wildfires
Spain was having a pretty low/average year until the past few weeks when it went roaring past previous years.
You can track this data here:
ourworldindata.org/wildfires
August 22, 2025 at 11:31 AM
Our @ourworldindata.org we visualise weekly updates of wildfire data from the Global Wildfire Information System.
Spain was having a pretty low/average year until the past few weeks when it went roaring past previous years.
You can track this data here:
ourworldindata.org/wildfires
Spain was having a pretty low/average year until the past few weeks when it went roaring past previous years.
You can track this data here:
ourworldindata.org/wildfires
This decline is not limited to the United States. It has been happening in many countries.
August 13, 2025 at 10:23 AM
This decline is not limited to the United States. It has been happening in many countries.
Death rates from cardiovascular disease have been falling for a long time, but we rarely hear about it.
@scientificdiscovery.dev looks at some of the medical innovations and changes in risk factors that are behind this: ourworldindata.org/cardiovascul...
@scientificdiscovery.dev looks at some of the medical innovations and changes in risk factors that are behind this: ourworldindata.org/cardiovascul...
August 13, 2025 at 10:21 AM
Death rates from cardiovascular disease have been falling for a long time, but we rarely hear about it.
@scientificdiscovery.dev looks at some of the medical innovations and changes in risk factors that are behind this: ourworldindata.org/cardiovascul...
@scientificdiscovery.dev looks at some of the medical innovations and changes in risk factors that are behind this: ourworldindata.org/cardiovascul...
Apologies - it seems actually downloading the chart from IEA cuts the legend out of the figures!
So here's a screenshot instead (with legend).
The nice blue colour is coal...
So here's a screenshot instead (with legend).
The nice blue colour is coal...
July 30, 2025 at 4:54 PM
Apologies - it seems actually downloading the chart from IEA cuts the legend out of the figures!
So here's a screenshot instead (with legend).
The nice blue colour is coal...
So here's a screenshot instead (with legend).
The nice blue colour is coal...
Coal use projected to increase in the US this year.
And it has increased in the first half of the year in the EU (at least partly due to falls in hydropower output).
www.iea.org/reports/elec...
And it has increased in the first half of the year in the EU (at least partly due to falls in hydropower output).
www.iea.org/reports/elec...
July 30, 2025 at 3:14 PM
Coal use projected to increase in the US this year.
And it has increased in the first half of the year in the EU (at least partly due to falls in hydropower output).
www.iea.org/reports/elec...
And it has increased in the first half of the year in the EU (at least partly due to falls in hydropower output).
www.iea.org/reports/elec...
The IEA projects that almost all of the growth in electricity production this year and next in China will be renewables.
Coal expected to drop this year.
From its mid-year electricity review: www.iea.org/reports/elec...
Coal expected to drop this year.
From its mid-year electricity review: www.iea.org/reports/elec...
July 30, 2025 at 3:11 PM
The IEA projects that almost all of the growth in electricity production this year and next in China will be renewables.
Coal expected to drop this year.
From its mid-year electricity review: www.iea.org/reports/elec...
Coal expected to drop this year.
From its mid-year electricity review: www.iea.org/reports/elec...
In September my new book is published in the UK 📚
This week (until Thursday) at Waterstones you can get 25% off a pre-order.
Congratulations!
www.waterstones.com/book/clearin...
This week (until Thursday) at Waterstones you can get 25% off a pre-order.
Congratulations!
www.waterstones.com/book/clearin...
July 28, 2025 at 5:54 PM
In September my new book is published in the UK 📚
This week (until Thursday) at Waterstones you can get 25% off a pre-order.
Congratulations!
www.waterstones.com/book/clearin...
This week (until Thursday) at Waterstones you can get 25% off a pre-order.
Congratulations!
www.waterstones.com/book/clearin...
From one of our recent data insights: ourworldindata.org/data-insight...
July 25, 2025 at 10:47 AM
From one of our recent data insights: ourworldindata.org/data-insight...
Nice post on the long march of electrification from @kingsmillbond.bsky.social, @daanwalt3r.bsky.social, @sambutl3r.bsky.social.
Lots of interesting charts!
ember-energy.org/latest-insig...
Lots of interesting charts!
ember-energy.org/latest-insig...
July 22, 2025 at 7:23 PM
Nice post on the long march of electrification from @kingsmillbond.bsky.social, @daanwalt3r.bsky.social, @sambutl3r.bsky.social.
Lots of interesting charts!
ember-energy.org/latest-insig...
Lots of interesting charts!
ember-energy.org/latest-insig...
When people find out how little is spent on foreign aid, they're less likely to say that the US spends "too much".
This might seem obvious, but many would argue that pointing to data or facts is never successful in changing peoples' minds.
This might seem obvious, but many would argue that pointing to data or facts is never successful in changing peoples' minds.
July 18, 2025 at 3:41 PM
When people find out how little is spent on foreign aid, they're less likely to say that the US spends "too much".
This might seem obvious, but many would argue that pointing to data or facts is never successful in changing peoples' minds.
This might seem obvious, but many would argue that pointing to data or facts is never successful in changing peoples' minds.