UAV applied to combat smog in Harbin (2/4)
2014-10-23 10:00
Ecns.cn
Web Editor:Yao Lan
Two workers of environmental protection department prepare to fly an unmanned aerial vehicle which is designed to monitor illegal straw burning in Harbin, Heilongjiang province on October 22, 2014. [Photo: China News Service/ Wang Dongliang]
