On 23-25 September 2012 the Kyiv City State Administration delegation headed by Alexander Popov has carried out a working visit to Stockholm. In frames of the visit the delegation met with Stockholm City Mayor Sten Nordin, as well as presented, with the participation of the Ambassador of Ukraine in Sweden Valerii Stepanov, the economic potential and tourism opportunities of Kyiv. The delegation also got acquainted with the experience of the Swedish capital in sustainable development viewing the example of Hammarby Sjöstad area and building renovation of inhabited area of Järva since 1960-1970's with the use of energy-efficient heating of dwellings. As a result on the negotiations between the Sides it was agreed to intensify cooperation between the sister cities.