Nonprofit leads crackdown on air pollution

Social enterprise measures emissions with drones and data visualization

Calling themselves the "Airmen", a group of young volunteers vows to bring back the blue skies by ferociously battling air pollution as grassroots inspectors.

Founded in 2014, Airman Environmental Technology is a nonprofit social enterprise that carries out third-party monitoring and investigation of the industrial release of toxic pollutants, actively assists governmental inspections and provides advice for the green transformation of industries during China's war on air pollution.