It is man-made as silica and other materials are melted down and fused together (chemically processed) to create it., It is a mixture of water, rock, sand and cement, It is man-made as it is made from man-made polymers which are chemically processed., It is made from a material from trees or petroleum., It is made from 2 natural materials: Iron and carbon., It is man-made because they are made from chemically processed oil (a natural material)., It is a material made mostly from wood pulp.,

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