It isn't known how long humans have been wearing shoes,but the earliest known leather pair dates back 5500 years-older than both Stonehenge and the Pyramids.Ever since then,shoe manufacture has been bad for the environment.Until the late 19th century,this was probably more a matter of it being very unpleasant to be around than damaging on a global scale-the substances used to tan leather included human and dog faeces.
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