BEIJING - China should provide more policy support for the construction of a "green" economy, a Chinese expert said at a UN press conference held in Beijing on Friday afternoon.

Experts and scholars were invited to the conference to discuss The "World Economic and Social Survey 2011" report, which was released in Geneva on July 5 by the UN Department of Economic and Social Affairs (UN-DESA).

The report mainly discussed the inevitable need for sustainable development and called for immediate global action to create more green economies.

The report said that major investment will be needed for the development of clean energy technologies, sustainable farming and forestry techniques, and the development of technologies that will reduce the production of non-biodegradable waste.

"China already has plenty of available technologies, but the problem is how to improve and expand the application of these technologies," said Zhang Xiao from the Chinese Academy of Social Sciences (CASS), noting that preferential policies and financial support are still needed.

Technological transformation efforts must occur at a national level and build upon local conditions and resources, the report said.

Cai Yuezhou, another CASS academic, said the government plays an essential role in the process of boosting technological transformation in China.

He also proposed creating a global public green technology-sharing system, which would feature networks linking up international technological research and application centers.

The report also praised China's scientific research input and personnel training efforts. "As a developing country, China faces some serious problems in its realization of sustainable development," said Zhang Youguo, also from the CASS.