BitumenBitumen is a non-crystalline solid or viscous material derived from petroleum, by natural or refinery process.Bitumen is brown……

Posted on 09 September at 08:45

Rocks: Defined as: Natural solid massive aggregates of minerals which form the Earth Crust. PetrologyA professional Civil Engineer……

Posted on 22 August at 06:02

POLLUTION Word Pollution which meaning, the adding of some constituents to air, water or land which harmfully alters the usual excellence……

Posted on 23 February at 08:38

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