Denmark is credited as a happy, healthy, prosperous and low-carbon country for it has been making great effort to reduce (1) in terms of transportation and renewable energy. Copenhagen, the capital of Denmark, boasts a quality (2) , where (3) could take you almost anywhere you want to go and are synchronized with buses. Moreover, bicycles are seen (4) in Copenhagen, which are separated from (5) . In Denmark, energy (6) is quite usual, such as the hotels’ (7) , natural light used by many buildings, and the appliance efficiency. In this country, renewable energy produced from windmills is (8) . Take Samso for example, all of its electricity is supplied by (9) .