Longterm sustainability of quarries
Earth's physical resources: rocks for roads - for iPad/Mac/PC
English - June 23, 2009 02:35 - 4 minutes - 49 MB VideoCourses Education nature street transport conservation recycle tonne concrete agriculture steel export Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
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A look at the road laying process. The need to supply locally, use natural road products and protect the environment around quarries.