Earth's physical resources: rocks for roads - for iPod/iPhone

Longterm sustainability of quarries

Longterm sustainability of quarries | کست وایبز

Transcript -- How a quarry works

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Rocks for Roads

Transcript -- An an introduction to this album

Transcript -- Rocks for Roads

How a quarry works

Transcript -- Quarry managers  explain how rock is formed and how they extract different layers of stone. Once  blasted and  processed, it is used to build roads.