Wang Yuqing, vice director of Committee of Population, Resources and Environment, member of the 11th CPPCC, delivered a speech at the opening ceremony of the fifth World Economic and Environmental Conference. The conference lasts from Nov. 17 to 18, 2012. Its topic is Future Momentum towards Economic Prosperity: Green and Sustainable Development, and the sub-topic is Post Rio+20 Summit: Outlook. [Xinhua]