this 7 meter construction smog free tower by the social design lab of dutch artist and innovator dan rosegarden cleans the air around it it uses positive ionization technology to capture fine dust and transform it into course dust. it cleans 30000 cubic meters of power and uses a modest amount of green electricity. it provides a local solution for clean air in a radius of about 60 meters in public spaces. towers have been tested in poland and china as well as the netherlands. regulating traffic is one essential solution to improve quality in most cities the expansion of the board system has not quite kept up with the growing amount of traffic in the city of hamburg germany. technology is now being used to veg unit and control the traffic in order to avoid congestion and to improve quality in a sustainable manner. as our cities become increasingly congested with more and more people on the move governments have to come up with new solutions to improve traffic flow and these days they're digital this brand new software is helping hamburg to improve the coordination of its construction sites. we'r