By the Numbers
Hannah RitchieUsing data and research to understand what really makes a difference
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 163 | Founded | 4 years ago | Last Issue | 7 days ago |
| Active | |||||
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hannahritchie.substack.comLatest Issues
Is Europe having a bad wildfire year?
Over the last week, this chart of wildfire burn in Europe has been doing the rounds on social media and traditional media outlets. Carbon Brief goes through some of this coverage here.
The underlying narrative is that Europe is having its...
Thailand’s population has already peaked
My colleague, Edouard Mathieu, recently created an interactive map showing when the populations of countries around the world are expected to peak. This is based on historical estimates and the UN’s medium projections (which we can endlessl...
My book — Clearing the Air — is coming out in paperback in September
Last September, my second book — Clearing the Air — was published in the UK in hardback. It has been published in various markets, including the US and Canada, since.
In just over a month — on 3rd September — the paperback version will com...
How much deforestation is your country importing through trade?
Deforestation is nearly always reported and measured based on the country where it happens.
In high-income countries, deforestation rates are now very low (we did most of our forest clearing a century or more ago to make space for agricult...
How quickly do electric car sales translate into cars on the road?
Last month, the International Energy Agency (IEA) published its estimates of electric car sales data for 2025. I updated all of this data in our charts on Our World in Data, if you want to dive into more detail.
Here, I wanted to share jus...
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