CNN's Erin Burnett shows how the world's tallest building uses smart, energy-saving technology.
Watch two Russian daredevils climb more than 2,000 ft. up the second tallest building in the world, Shanghai Tower.
Chicago's Willis tower loses the height debate to the World Trade Center's Tower One
Urban Oasis, another eco-design by Chetwoods Architects, is meant to mimic a growing flower. It collects light, water and wind as energy and serves as a light sculpture at night.
courtesy Chetwoods Architects