Sustainability by numbers
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My new book — Clearing the Air — is coming out in September!
A Hopeful Guide to Solving Climate Change — in 50 Questions and Answers.
4 hrs ago
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Hannah Ritchie
61
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Sustainability by numbers
My new book — Clearing the Air — is coming out in September!
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June 2025
How does geothermal energy work, and why don’t we use it more?
A primer on geothermal energy, and why it provides just 0.3% of the world's electricity.
Jun 30
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Hannah Ritchie
119
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How does geothermal energy work, and why don’t we use it more?
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44
How big is the generational divide on climate change?
The generational divide on belief and concern about climate change is small; there are slightly bigger gaps in what to do about it.
Jun 19
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Hannah Ritchie
121
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How big is the generational divide on climate change?
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32
Under-the-hood of writing on Substack
Subscribers, revenue, and why more people should write long-form.
Jun 11
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Hannah Ritchie
264
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Under-the-hood of writing on Substack
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47
Eating wild animals might be sustainable for the few, but not for the many
Some back-of-the-envelope calculations on how many it could feed.
Jun 2
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Hannah Ritchie
118
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Eating wild animals might be sustainable for the few, but not for the many
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32
May 2025
Why are solar panels and batteries from China so cheap?
It's more to do with automation and state-of-the art manufacturing processes than cheap labour.
May 15
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Hannah Ritchie
242
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Why are solar panels and batteries from China so cheap?
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51
What's the carbon footprint of using ChatGPT?
Very small compared to most of the other stuff you do.
May 6
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Hannah Ritchie
258
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What's the carbon footprint of using ChatGPT?
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88
April 2025
Do imports of cheap solar panel and other technologies help or hurt domestic jobs in clean energy?
Without a comparative advantage, cheaper energy imports often help domestic jobs.
Apr 21
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Hannah Ritchie
134
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Do imports of cheap solar panel and other technologies help or hurt domestic jobs in clean energy?
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30
Many second-hand electric cars are cheaper up-front than their petrol equivalents
And no, it's not just for old ones that have done lots of miles.
Apr 3
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Hannah Ritchie
86
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Many second-hand electric cars are cheaper up-front than their petrol equivalents
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37
March 2025
Could whales be a solution to climate change? Probably only a very small one.
The numbers don’t live up to some of the hype.
Mar 24
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Hannah Ritchie
105
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Could whales be a solution to climate change? Probably only a very small one.
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18
Some key insights from the UK Climate Change Committee’s Seventh Carbon Budget
What would it take for the UK to get to net-zero by 2050?
Mar 6
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Hannah Ritchie
110
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Some key insights from the UK Climate Change Committee’s Seventh Carbon Budget
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25
How big were wildfires in 2024?
Global burned area was about average, but it was a big year for South America.
Mar 3
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Hannah Ritchie
66
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How big were wildfires in 2024?
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