Panelists discuss who should contribute to tackle climate change . I 'm skeptical , unfortunately , that we will have in the foreseeable future a global carbon market , but what we will have is domestic schemes spring up . U.N. climate change secretary for Mexico should take the lead . Mexican president calls for all nations to contribute .
Panelists discuss who should contribute to tackle climate change . U.N. climate change secretary for Mexico should take the lead . Mexican president calls for all nations to contribute .