By the Numbers
Subscribe
Sign in
Home
Archive
About
My book is published in the US today, and I'm shortlisted for the Unwin Award
Three things for today.
16 hrs ago
•
Hannah Ritchie
128
24
8
Does that use a lot of energy?
An interactive tool to get a sense of scale for energy consumption.
Feb 16
•
Hannah Ritchie
195
86
23
Do subsidies make meat much cheaper?
A little, but not much. Certainly not enough to make them cheaper than meat substitutes.
Feb 9
•
Hannah Ritchie
100
26
18
Most Popular
View all
What's the carbon footprint of using ChatGPT?
May 6, 2025
•
Hannah Ritchie
299
92
65
What’s the impact of artificial intelligence on energy demand?
Nov 18, 2024
•
Hannah Ritchie
246
46
45
Five(ish) charts that give some context to Venezuelan oil
Jan 5
•
Hannah Ritchie
396
60
75
Why are solar panels and batteries from China so cheap?
May 15, 2025
•
Hannah Ritchie
290
59
61
What's the carbon footprint of using ChatGPT or Gemini? [August 2025 update]
Aug 21, 2025
•
Hannah Ritchie
205
39
28
Eliminating contrails from flying could be incredibly cheap
Oct 7, 2025
•
Hannah Ritchie
238
63
34
Latest
Top
Discussions
The changing (and perhaps surprising) geography of diabetes
Diabetes is growing much faster in South Asia and Africa than in Europe or North America.
Feb 2
•
Hannah Ritchie
166
12
15
We could produce a lot of electricity on the land used for biofuels
About enough to meet current global electricity demand.
Jan 27
•
Hannah Ritchie
244
203
45
Are bees booming or dying off?
Bees are more than just honeybees.
Jan 20
•
Hannah Ritchie
181
41
26
Many people are individually optimistic but think the world is falling apart
Most people are personally optimistic, but socially pessimistic. This can be a drag on collective progress.
Jan 13
•
Hannah Ritchie
287
58
67
The low life expectancy of Americans is not just about deaths among young people
Even those who reach 65 are at a disadvantage relative to peer countries.
Jan 7
•
Hannah Ritchie
230
75
43
Five(ish) charts that give some context to Venezuelan oil
It has the world's largest reserves, produces comparatively little, and has a type of oil that the US needs.
Jan 5
•
Hannah Ritchie
396
60
75
Some changes to Sustainability by Numbers in the new year
What's coming up in 2026?
Dec 22, 2025
•
Hannah Ritchie
250
37
8
See all
By the Numbers
Using data and research to understand what really makes a difference
Subscribe
Recommendations
View all 15
Fix The News
Angus Hervey
Noahpinion
Noah Smith
Exponential View
Azeem Azhar
Sustain What
Andy Revkin
The Weekly Anthropocene
Sam Matey-Coste
By the Numbers
Subscribe
About
Archive
Recommendations
Sitemap
This site requires JavaScript to run correctly. Please
turn on JavaScript
or unblock scripts
