By the Numbers
Subscribe
Sign in
Home
Archive
About
Receiving the Unwin Award
And you can get my book for 99p on Kindle for all of May!
Apr 29
•
Hannah Ritchie
247
41
12
Are only one-third of Britain’s railways electric?
Which countries are the leaders and laggards on rail electrification, and why should we care?
Apr 27
•
Hannah Ritchie
185
63
15
An end to cervical cancer is possible
And some countries are already on track to do so.
Apr 13
•
Hannah Ritchie
210
9
23
Most Popular
View all
What's the carbon footprint of using ChatGPT?
May 6, 2025
•
Hannah Ritchie
312
92
66
What’s the impact of artificial intelligence on energy demand?
Nov 18, 2024
•
Hannah Ritchie
252
42
45
Five(ish) charts that give some context to Venezuelan oil
Jan 5
•
Hannah Ritchie
402
60
75
What's the carbon footprint of using ChatGPT or Gemini? [August 2025 update]
Aug 21, 2025
•
Hannah Ritchie
212
40
28
Why are solar panels and batteries from China so cheap?
May 15, 2025
•
Hannah Ritchie
293
54
61
Eliminating contrails from flying could be incredibly cheap
Oct 7, 2025
•
Hannah Ritchie
255
63
36
Latest
Top
Discussions
The UK is cutting its aid budget to the lowest level in decades
After pledging to increase the budget to 0.7% of GNI, the government is cutting it to 0.3%.
Apr 1
•
Hannah Ritchie
130
54
12
Technology can cut plane contrails by two-thirds. Getting airlines to use it isn't so easy
Flights that followed an avoidance path cut contrails by almost two-thirds. But getting dispatchers and pilots comfortable with these routes will be…
Mar 23
•
Hannah Ritchie
131
18
13
Will Africa still be energy-poor in 2050?
Projections suggest that electricity consumption across the region will still be incredibly low decades from now.
Mar 17
•
Hannah Ritchie
161
27
16
Does China have a huge electricity advantage over the United States?
China uses most of its electricity for industry, while the US consumes it in households and commercial services.
Mar 5
•
Hannah Ritchie
209
47
23
Does that use a lot of energy? [Update]
An interactive tool that lets you compare the energy consumption of various products and activities.
Mar 3
•
Hannah Ritchie
244
32
35
My book is published in the US today, and I'm shortlisted for the Unwin Award
Three things for today.
Feb 17
•
Hannah Ritchie
193
26
10
Does that use a lot of energy?
An interactive tool to get a sense of scale for energy consumption.
Feb 16
•
Hannah Ritchie
235
93
24
See all
By the Numbers
Using data and research to understand what really makes a difference
Subscribe
Recommendations
View all 16
Sustain What
Andy Revkin
The Weekly Anthropocene
Sam Matey-Coste
The Climate Brink
Andrew Dessler
Noahpinion
Noah Smith
Bright Spots
Jan Rosenow
By the Numbers
Subscribe
About
Archive
Recommendations
Sitemap
This site requires JavaScript to run correctly. Please
turn on JavaScript
or unblock scripts