There have been many grand declarations on climate change from various high level meetings. Here's a Greenpeace guide to Kyoto, Bali, APEC, the G8 and Major Emitters meeting.
Some of 2007's climate meetings have been useful – and some of them, like the Bush and Howard efforts at APEC, are aimed at undermining progress to achieve what the climate science tells us we need: deep cuts in greenhouse gas emissions – and binding commitments to get there.