1. Climate change - reading the past in tree ring data
Play • 52 min

Global temperature changes we have experienced in the twentieth and twenty-first centuries are unprecedented in terms of speed, suggesting a real climate emergency. Professor Mary Gagen, of Swansea University’s Geography Department, measures tree ring data – ‘weather stations across the world’. Her research focuses on climate change over the last few thousand years, to determine how our current global changes compare to recent history.

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