Oslo marks start of its year as European Green Capital 2019

Karmenu Vella, European Commissioner for the Environment, Maritime Affairs and Fisheries, speaks at a ceremony at Oslo City Hall in Oslo, Norway, Jan. 4, 2019. Norway's capital city Oslo on Friday marked the start of the city's year as European Green Capital 2019 and will act as an ambassador for sustainable urban development. (Xinhua/Liang Youchang)