An event for the 2019 World Environment Day is held in Hangzhou, east China's Zhejiang Province, June 5, 2019. (Xinhua/Huang Zongzhi)
Guests attend an event for the 2019 World Environment Day in Hangzhou, east China's Zhejiang Province, June 5, 2019. (Xinhua/Huang Zongzhi)
Guests attend an event for the 2019 World Environment Day in Hangzhou, east China's Zhejiang Province, June 5, 2019. (Xinhua/Huang Zongzhi)
Former United Nations Secretary-General Ban Ki-moon speaks during an event for the 2019 World Environment Day in Hangzhou, east China's Zhejiang Province, June 5, 2019. (Xinhua/Huang Zongzhi)