Theme 
In meeting the new challenges in the 21st century, the 4th symposium on sustainable development - cooperation among Hong Kong, Macau and Guangdong will be organised. The theme of this symposium is "sustainable development of GZ, HK and Macau - our common goal" (同一天空下的粵港澳可持續發展). It aims to provide a platform for the sharing of experience in research, planning and implementation of sustainable developments in the Pearl River Delta and to foster cooperation of professionals in the field of sustainable development. The topics will include ecological protection, energy saving and emission reduction, global climate change, application of innovation and technology, for sustainable development of the region. 

Submission 
Submission for abstracts and full papers are now invited. The submitted papers should be original and should have not been expressed or published. Abstracts of approximately 400 words (or 500 words in Chinese) and full paper of not more than eight pages or 4,000 words (or 5,000 words in Chinese) should be submitted to the secretariat not later than 30 June 2008 and 30 July 2008 respectively.