Tech needed to improve air

Smog-dispersal drone set to be tested; top leaders reiterate concerns over environment

Legislators and political advisers have called for advanced technologies to be used in helping China battle air pollution, with the nation soon due to test a cutting-edge drone designed to clear smog.

"Science and technology play a very significant role in cutting down pollutants," said Wang Xiangchao, a researcher at the Shanghai Institute of Optics and Fine Mechanics under the Chinese Academy of Sciences.