Concrete is everywhere, yet it is one of the greatest polluters on earth. It is created by combining cement with sand, water and larger rocks. Cement reacts with water and creates limestone conections between the pieces of aggregate.

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We are capable of harnessing the Nature's ability to do the same. Some micro-organisms are capable of same mechanism, they biomineralize. We can enhance their ability to biomineralize through genetic engineering and use them in construction instead of cement.