In 2024, scientists heated Biosphere 2’s rainforest canopy to 133°F to test tropical trees under extreme heat; young cacao wilted, but most trees endured

A group of scientists conducted an intriguing experiment on tropical trees within Biosphere 2, where they deliberately shut off air conditioning and raised the temperature significantly. While some tree species reacted negatively, wilting under heat, others demonstrated remarkable resilience. Interestingly, humidity levels played a protective role, helping most trees to endure the elevated temperatures, although prolonged warming adversely affected their ability to photosynthesize.
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