You can learn more on global and local environmental issues , environmental situation , environmental protection principles and method from its reference library , display panels & environmental garden . the centre was originally the old wan chai post office which opened in 1915 该中心内设有参考图书馆、展览角和环保花园，介绍现时本港和世界各地的环境状况与环保问题，以及各项环保原则和改善环境的方法。
Each centre has a reference library with publications and audio - visual resources on employment and training opportunities . careers videos and vcds are available for free loan to secondary schools and youth organisations . careers counselling and guidance service are also available to visitors of the centre 中心均设有参考图书馆，提供有关就业及培训机会的刊物和视听资料，更备有关于择业资料的录影带及视像光碟，供各中学和青年机构免费借用。
As a depository library for nine international organisations , the city hall reference library receives full sets of publications from the asian development bank , the united nations , the world bank , the united nations educational , scientific and cultural organisation , the world trade organisation , the world food programme , the international labour organisation , the international maritime organisation and the european union 大会堂参考图书馆是亚洲开发银行、联合国、世界银行、联合国教育、科学及文化组织、世界贸易组织、世界粮食组织署、国际劳工组织、国际海事组织及欧洲联盟等9个国际组织的刊物藏书处，存放了这些组织的全套刊物。
