Speaking at the Taipei Water Park this spring, Mayor Ko Wen-je urged audience members to "think about where water comes from when they drink it."Ko's comment came at the premiere of "Tracing Roots," a documentary film on the history of Taipei's water supply, starting from the 19th century, when residents dug their own wells, to the city's current management system that collects, purifies and distributes 2.4 million cubic tons of potable water every day.Most of the film's 25-minute running time focuses on the period of Japanese occupation, the 50 years between 1895 and 1945 when colonial man…READ FULL ARTICLE