Danish capital , Copenhagen , one of the greenest cities in Europe . It 's just one of hundreds of activities and events which Copenhageners have organized to coincide with the 11-day U.N. summit taking place at the Bella Center in the Orestad district in the southeast of the city . U.N. climate summit is biggest political event Denmark has hosted . Comment:
Danish capital , Copenhagen , one of the greenest cities in Europe . U.N. climate summit is biggest political event Denmark has hosted . Comment: