The world 's next tallest building is being built in China , and the two towers will clean the air around them . Comment: Chetwoods chairman tells CNN he wanted the project to be more than an architectural statement .
The world 's next tallest building is being built in China , and the two towers will clean the air around them . The Phoenix project has been designed by London-based architects Chetwoods , building will begin 2016 . Chetwoods chairman tells CNN he wanted the project to be more than an architectural statement .