Thirty years of scientific development in waste management: from enlightenment to entrapment. An ISWA Conference in the " City of Life" Impressions of the Iswa International symposium and exhibition on waste management in Asian Cities. 23/26th october 2000. Municipal solid waste management and recycling of secondary raw materials in China. Muicipal solid wastes- a problem in Romania. Millennium discussions on sustainable waste management in Asian Cities took place in Hong Kong.