Cotton-like poplar catkins create nuisance in E China's city
Residents in urban area are seen wearing masks to avoid poplar catkins invading their nostrils and mouths in Weifang, east China's Shandong province, April 9, 2016. Catkins, female poplars or willows' cotton-like seed clusters, fill the air and create a nuisance during spring. (Xinhua/Zang Chi)
