Hydrogen balloons used to help spray pesticides

A farmer named Wang Shanjun uses a hydrogen balloon to help him spray pesticides. The balloon helps him carry the spray compressor, to easily spray pesticides on his land in Huai'an, Jiangsu Province. Three or four people can operate this device. It has proved to be more cost-effective compared with drones and more efficient than manual labor. Most importantly, this saves the pesticides and improves grain output. [Photo:VCG]