| http://www.w3.org/ns/prov#value | - yes no doubt that, concrete is the dirtiest industrial material for making building. but there is a science in it. it is a composition of water, cement, sand and some other substance. and today???s tech world it has given us sky touching buildings. its not a new technique 1900 years ago Romans about this technology that???s why we are able to see today, Pyramids, and The Pantheon. in making of con
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