About

Photo: Ryan Lash / TED

šŸ‘‹šŸ¼ Hi, Iā€™m Hannah.

Iā€™m a data scientist and science communicator. I focus on the largest problems that shape our world, and how to solve them.

Most of my work focuses on environmental sustainability, including climate change, energy, food and agriculture, biodiversity, air pollution and deforestation.

I’m Deputy Editor and Lead Researcher at Our World in Data, and a researcher at the Oxford Martin Programme in Global Development, at the University of Oxford.

I write weekly (ish) on my Substack ā€“ Sustainability by Numbers.

You can find me on Twitter (@_HannahRitchie).

Or reach me by email: hannah@ourworldindata.org


My forthcoming book: January 2024

Find out more, and pre-order here.


TED Talk