Visitors watch a simulation showing the global heating on the earth at the Hannover Messe fair in Hanover

 
Visitors watch a simulation showing the global heating on the earth at the Hannover Messe fair in Hanover
Visitors watch a simulation showing the global heating on the earth on the stand of German utility company EnBW at the "Hannover Messe" industrial trade fair in Hanover April 16, 2007. The world's leading fair for industrial technology with about 6,400 exhibitors from 62 nations opens to the public on Monday and runs till April 20 showing their latest products and technical innovations. REUTERS/Christian Charisius (GERMANY)