Propaganda from the UN climate change bureaucracy

Ramping up the propaganda leading up to the December 2015 UN summit in Paris, UN climate bureaucrat, Christiana Figueres, in today's National Post, addressed Canada's role in the global effort to cut greenhouse gas emissions. Some of the first words were:

... [human] emissions have been scientifically proved beyond any reasonable doubt to cause global warming, and if unchecked will have calamitous and costly consequences for Canada and the world.

By itself, the statement that "[human] emissions have scientifically proved beyond any reasonable doubt to cause global warming" is true.  However, combined with the second part "if unchecked will have calamitous and costly consequences ..."  and the subsequent blather about the urgency of reducing global emissions, Figueres is saying that it has been proven beyond any reasonable doubt that human emissions are the dominant cause of global warming. and that is flat-out false.

There is a great deal of reasonable doubt about the extent of the human contribution to global warming.  One notable expression of that reasonable doubt comes from Judith Curry, Professor of Earth and Atmospheric Sciences, Georgia Institute of Technology.  She recently gave testimony at the US Congressional Hearings into the President's UN climate pledge. The lead-in paragraphs of her testimony:

"The central issue in the scientific debate on climate change is the extent to which the recent (and future) warming is caused by human-caused greenhouse gas emissions versus natural climate variability that are caused by variations from the sun, volcanic eruptions, and large-scale ocean circulations.

Recent data and research supports the importance of natural climate variability and calls into question the conclusion that humans are the dominant cause of recent climate change.  .... "