Meet the American hermit who's doing his bit to combat climate change
  • 5 years ago
Climate change is considered by many to be the greatest challenge of our age. The planet is warming up - and the consequences could be dramatic for generations to come. If scientists are to understand what's happening they need good data - and one man in the US state of Colorado has made it his mission to supply as much as possible. The BBC's Tim Allman explains.
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