Input: Relationship: 'ratify', Argument/Subject 1: 'canada', Argument/Subject 2: 'kyoto'

Answer: While Canada has ratified the Kyoto Protocol with its legally binding limits on carbon dioxide emissions , some provincial agencies have gone their own way , choosing to support President George W. Bush 's Global Climate Change Initiative , which calls for an 18 percent reduction in U.S. greenhouse gas intensity by 2012 using voluntary means .