The Worldfocus newsroom celebrates the end of the decade with a look at some of the smartest ideas worldwide. We produced an eclectic list of ten innovative solutions to social and political problems. View a slideshow of the winners -- from Bangladesh and Bhutan to Guyana and Rwanda.

John Larson travels to Denmark's Samso Island to report on its efforts to eliminate fossil fuel use. In 1998, Samso, population 4,000, devised a bold plan to completely switch to renewable energy. Today, the island is 100% carbon-neutral.

Last week, we showed you how everyday Danes profit from pioneering wind power. But there's a challenge -- how to store that power when the wind isn't blowing. John Larson reports on how Denmark is searching for answers, including building Europe's first "hydrogen neighborhood" -- homes that are powered and heated with the help of hydrogen fuel cells.

Producer John Larson reports from Copenhagen, Denmark, on how changing lifestyles, taxing energy and subsidizing alternative technologies have reduced the country's dependency on oil and created thousands of new jobs.

In recent months, Greenland has taken steps towards self-rule. Cultural identity is also highly important to Greenlanders, and Jason George of the Pulitzer Center on Crisis Reporting writes that the traditional Greenlandic language has become a symbol for national pride.