"The world needs action from the United States," Calderon said.
But climate change legislation is all but dead in the United States for the forseeable future. Instead, Obama has floated the idea of reducing the country's emissions by requiring that 80 percent of the country's electricity come from "clean energy" sources like wind, nuclear and natural gas by 2035.
At the Davos summit, European Union Climate Commissioner Connie Hedegaard said that, lacking strong policy, U.S. businesses must act to reduce their greenhouse gas emissions.
"The solutions have to come from business," she said, according to The Associated Press. "They will have to come up with alternative ways of doing things."