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The 20th World Water Week has been launched in the Swedish capital, Stockholm. Water quality is this year's focus. Thousands of experts from around the world will discuss how to prevent water pollution, and make reasonable use of water.
It is expected that close to two and a half thousand people will participate in Water Week. Among them will be government representatives, business people, and scientists.
The Stockholm International Water Institute explains that, with booming population growth and fast economic development, water quality has become a main focus. World Water Week was established by the Water Institute in 1990, and is held annually.