Sustainability by numbers
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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
216
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Under-the-hood of writing on Substack
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43
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
•
Hannah Ritchie
108
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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
232
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Why are solar panels and batteries from China so cheap?
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50
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
243
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What's the carbon footprint of using ChatGPT?
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80
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
132
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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
•
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
•
Hannah Ritchie
103
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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
•
Hannah Ritchie
108
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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
•
Hannah Ritchie
66
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How big were wildfires in 2024?
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22
February 2025
Solving for Climate: the podcast is back
And a recap of books I've been reading recently.
Feb 25
•
Hannah Ritchie
81
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Solving for Climate: the podcast is back
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5
Do US states with more renewable energy have more expensive electricity?
Despite California being the poster child of high prices, the data suggests no.
Feb 11
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Hannah Ritchie
142
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Do US states with more renewable energy have more expensive electricity?
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31
State-by-state electricity mixes and prices in the United States
Free, interactive slide decks on the changing electricity mixes, prices, and bills in all US states.
Feb 5
•
Hannah Ritchie
115
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State-by-state electricity mixes and prices in the United States
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11
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