George Bush, the US president, has welcomed what he said was "significant progress" on measures to reduce greenhouse gas emissions, despite criticsm that a three-day G8 summit in Japan has failed to set any specific targets or benchmarks for cuts. What do you think the G8 summit achieved? Was the summit just a photo opportunity or was "significant progress" made? What do you think the summit should have focused on and what would you like to have seen it achieve?