Mining companies are required to return quarried sites to their 'natural character'. But is that enough?
New Zealand has more than 1,100 registered quarries. Some of these mined sites are small, rural operations, but a significant number are large and complex, and within a city's urban boundaries.
from Phys.org - latest science and technology news stories https://ift.tt/37sxcZZ
from Phys.org - latest science and technology news stories https://ift.tt/37sxcZZ
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