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The Harvard Climate Brief brings Harvard faculty expertise on climate change and sustainability to the wider world. Authors’ views are their own. Republish.

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Climate Explained
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A European Space Agency transport vehicle burning up on reentry at the end of its mission. (ESA)

Burning satellites in the stratosphere: Emerging questions for climate  

Since the start of the space age, humans have treated the upper atmosphere like a garbage dump. Here is what we know – and what we don’t – about incinerated space trash.
Climate Explained
Tue, Jan 27, 2026
cocoa

Chocolate’s climate crisis

Harvard researchers find changing rainfall patterns spell a volatile future for global cocoa crops, turning chocolate into a climate barometer.
Climate Explained
Thu, Oct 16, 2025
a drawing of Benjamin Franklin

Benjamin Franklin was America’s first climate scientist

We’re not the first generation to recognize and fight climate change. But people in Franklin's day showed little hesitation discussing the problem openly.
Climate Explained
Mon, Mar 3, 2025

All perspectives expressed in the Harvard Climate Brief are those of the authors and not of Harvard University or the Salata Institute for Climate and Sustainability. Any errors are the authors’ own. The Harvard Climate Brief is edited by an interdisciplinary team of Harvard faculty.