Norway's Environment Minister Erik Solheim speaks during the U.N. climate change conference in Poznan December 11, 2008. The Poznan talks are reviewing progress at the halfway mark of a two-year push to work out a global pact to succeed the Kyoto Protocol, the U.N. pact binding 37 nations to curb emissions by about 5 percent below 1990 levels by 2008-2012. REUTERS/Kacper Pempel (POLAND)