On higher ground
Two visitors in a hut with vegetated walls at an exposition in Beijing. Chen Xiaogen / For China Daily |
Greening more rooftops can help the capital clean up its air, Cheng Anqi reports in Beijing.
Photo
Two visitors in a hut with vegetated walls at an exposition in Beijing. Chen Xiaogen / For China Daily |
Greening more rooftops can help the capital clean up its air, Cheng Anqi reports in Beijing.