The Daan Roosegaarde smog vacuum is designed to quickly clean the dirty skies of Beijing. Roosegaarde's vacuum is only a vacuum in the sense that it sucks particles of smog down to the ground. It works using copper coils buried underground that create an electrostatic field. The electrostatic field draws particles of smog down to the ground where it can be captured. The field itself is weak enough to be safe to humans and to not interfere with electronic medical devices.
The Daan Roosegaarde smog vacuum may sound too good to be true. However, a small-scale prototype was built and tested successfully with help from smog scientists at the University of Delft. The mayor of Beijing has agreed to let the Dutch designer build a small park to serve as a testing ground for the vacuum. The project is expected to take between 12 and 15 months to complete.