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gravel | by Wolfgang Staudt
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gravel

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Gravel is an important commercial product, used in many applications. Many roadways are surfaced with gravel, especially in rural areas where there is little traffic. Globally, far more roads are surfaced with gravel than with concrete or tarmac; Russia alone has over 400,000 km of gravel-surfaced roads.

 

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Taken on July 31, 2006