The Harper government lets down the world at COP17. How should we respond?

The Canadian government is letting the world down at the United Nations climate change talks (COP17) now taking place in Durban, South Africa.

According to the Climate Action Network Canada, 100 per cent of Canada's increases in fossil fuel emissions by 2020 will come from Alberta's tar sands, and Canada has said it will not meet its Kyoto targets. And insult was added to injury with rumours on the first day of COP17 that Canada will pull out of Kyoto before Christmas. Environment minister Peter Kent is neither confirming or denying this. 

How should Canadians respond to their government's failed response to climate change?