Former U.S. Vice President Al Gore was due to host the 24-hour live webcast from the foot of the Eiffel Tower to drum up attention for this month's international climate summit in Paris. Besides Gore, who helped negotiate the 1997 climate treaty that failed to control global warming, the broadcast was to feature musical performances by Elton John, Duran Duran and others. Gore's aim is to raise awareness about global warming a few weeks before world leaders gather for the COP 21 Paris climate summit opening Nov.