AB Ellis, the Russian architectural bureau, has developed a very futuristic project called Eco-City 2020. It proposes to build the eco-city inside the crater located on the edge of Mirny, Yakutia, Siberia/Russia. AB Ellis is offering to construct a gigantic structure inside the man-made crater with a diameter of 1 km and a depth of 550 m. In the very diamond mine crater that is depicted in many photographs of Mirny and considered as one of the world’s largest ones. As far as you know, Mirny is the…