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He Ying: Oh dear, the sky. It’s dusty. Li Dong: terrible! Another is coming! He Ying: Yeah, it makes it hard people breathe. Li Dong: And the dust me very sick. He Ying: too. And look, the traffic is so . Li Dong: Sandstorms cause traffic . He Ying: We do something it. Li Dong: Right. We plant more trees and grasses.