The smog free tower is under construction in North China's Tianjin city on March 31, 2017. [Photo/VCG]

Designers from the Netherlands have brought their smog free tower to North China's Tianjin city. The seven-meter-tall tower is essentially a large outdoor air purifier, sucking polluted air in through electrostatic adsorption technology and filtering out the smog particles before releasing clean air. The tower will start running soon after installment and adjustment of core components.