But tough talk came from Xie Zhenhua, a member of the central committee of the Chinese Communist Party and head of China's Climate Change and Coordinating Committee.
"China is not a country that does nothing: On the contrary, we have done a lot," Xie said Wednesday. He ticked off a list of market-based measures such as financial incentives and taxes used by China to cut emissions.
Cantwell and Xie both spoke at a Washington, D.C., symposium sponsored by the Carnegie Endowment for International Peace.
"The United States is in the same boat," Xie added. "They just talk about it but there are no actions, and we don't even know whether Congress will pass it."