Our new map reveals the effects of 20th century land-use and climate change on Britain's wild species 

Under the stewardship of geographer Sir Dudley Stamp, thousands of volunteers (including many schoolchildren) came together in the 1930s on a mission that sounds relatively simple on paper: to record how British land was being used. Equipped with an Ordnance Survey map, a clipboard and a pencil, these volunteers recorded information that collectively formed the earliest spatial record of where and how the British people were using their environment at the beginning of the third agricultural revolution. Spanning the mid-20th century, that revolution changed the British landscape almost beyond recognition.
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