Sustainability by numbers

Sustainability by numbers

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No, growing more food does not mean we always need more and more inputs
Many lower-income countries do, but high and middle-income countries have reduced fertilisers, pesticides, labour, and land without reducing food…
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Hannah Ritchie
31
Population growth or decline will have little impact on climate change
It'll be too slow and too late for the timeframes that we need to decarbonise.
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Hannah Ritchie
123
My new book — Clearing the Air — is coming out in September!
A Hopeful Guide to Solving Climate Change — in 50 Questions and Answers.
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Hannah Ritchie
24

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.
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Hannah Ritchie
45
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.
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Hannah Ritchie
33
Under-the-hood of writing on Substack
Subscribers, revenue, and why more people should write long-form.
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Hannah Ritchie
50
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.
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Hannah Ritchie
33

May 2025

April 2025

March 2025

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