ends with a parade and in 2007, 50,000 people marched with the parade and about 500,000 watched. The Stockholm Marathon takes place on a Saturday in early June each year. The Nobel Banquet takes place at Stockholm City Hall every year on 10 December. The Stockholm Water Festival () was a popular summer festival held annually in Stockholm between 1991 and 1999. Manifestation, a yearly ecumenical Christian festival with up to 25,000 participants. Summerburst Music festival The Stockholm International Film Festival is an annual film festival held in Stockholm each year since 1990. Environment Green city with a national urban park Stockholm is one of the cleanest capitals in the world. The city was granted the 2010 European Green Capital Award by the EU Commission; this was Europe's first "green capital". Applicant cities were evaluated in several ways: climate change, local transport, public green areas, air quality, noise, waste, water consumption, waste water treatment, sustainable utilisation of land, biodiversity and environmental management. Out of 35 participant cities, eight finalists were chosen: Stockholm, Amsterdam, Bristol, Copenhagen, Freiburg, Hamburg, Münster, and Oslo. Some of the reasons why Stockholm won the 2010 European Green Capital Award were: its integrated administrative system, which ensures that environmental aspects are considered in budgets, operational planning, reporting, and monitoring; its cut in carbon dioxide emissions by 25% per capita in ten years; and its decision towards being fossil fuel free by 2050. Stockholm has long demonstrated concern for the environment. The city's environmental program is the fifth since the first one was established in the mid-1970s. In 2011, Stockholm passed the title of European Green Capital to Hamburg, Germany. Role model At the beginning of 2010, Stockholm launched the program Professional Study Visits in order to share the city's green best practices. The program provides visitors with the opportunity to learn how to address issues such as waste management, urban planning, carbon dioxide emissions, and sustainable and efficient transportation system, among others. According to the European Cities Monitor 2010, Stockholm is the best city in terms of freedom from pollution. Surrounded by 219 nature reserves, Stockholm has around 1,000 green spaces, which corresponds to 30% of the city's area. Founded in 1995, the Royal National City Park is the world's first legally protected "national urban park". For a description of the formation process, value assets and implementation of the legal protection of The Royal National Urban Park,