Net export of embodied energy in international trade from China has grown in recent years because of the country's trade surplus, according to a study released yesterday.

Embodied energy refers to that required for raw material procurement, manufacture, transport, construction, maintenance and repair.

A new report by the Chinese Academy of Social Sciences (CASS) with the support of the World Wide Fund for Nature (WWF) was delivered on the sidelines of the UN climate change conference in Bali.