Reuters: Residents of central Paris got a chilling reminder on Thursday of the challenge facing negotiators at the world climate summit on the city's outskirts: 80 tonnes of Greenland ice left to slowly melt on the cobbles in front of the Pantheon. The ice was scooped from a Greenland fjord and hauled to Paris as part of an installation by the visual artist Olafur Eliasson, best known for building waterfalls in New York City in 2008 and an artificial sky inside the Tate Modern gallery in London in 2003....