Since the early 1990s, 3E, with the support of government departments and cooperation with major international organizations, has actively participated in the IPCC report, UNEP Global Emission reduction Gap Assessment report, international climate change negotiations under the UNFCCC, COP and so on.

The important projects including “Research on supporting technologies of industry emission reduction and market mechanism in international response to climate change”, “Study on strategies and countermeasures of China's participation in international cooperation mechanism on climate change”, “The mechanism of Carbon Offsetting and Reduction Scheme for International Aviation”, “Innovative integrated simulation of multi-models of global and Chinese energy-economy-environment-climate”.