Last summer was the warmest in at least 2,000 years, according to new research, which analyzed weather data and tree rings to reconstruct a detailed picture of the past.
Ancient trees unlock an alarming new insight into our warming world
![](https://mcknews.com/wp-content/uploads/2024/05/gettyimages-1644577180-664418b9ab153-OnX7p7.jpeg)
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