The revelation of the CRU's climate data manipulation, which led to ClimateGate, has presented a window of opportunity to express skepticism and mounting doubt regarding climate change/AGW. A group gathered in Copenhagen has done just that:

.. . more than 50 scientists, businessmen and lobby groups met to discuss the arguments against man made global warming.

[...]

Professor Henrik Svensmark, a physicist at the Danish National Space Center in Copenhagen, said the recent warming period was caused by solar activity.

He said the last time the world experienced such high temperatures, during the medieval warming period, the Sun and the Earth were in a similar cycle.

Professor Nils-Axel Morner, a geologist from Stockholm University, said sea level rise has also been exaggerated by the "climate alarmists" using computer models.

He said observational data from lake sediments, coast lines and trees show sea levels have remained stable.

Professor Cliff Ollier, another geologist from the University of Western Australia, also said the environmental lobby have got it wrong on ice caps. He said the melting of ice sheets is caused by geothermal activity rather than global surface temperatures.

Professor Ian Plimer, from the University of Adelaide, claimed carbon dioxide from volcanoes rather than humans is driving warming as part of a natural process.

The meeting was organised by Danish group Climate Sense and the lobby group Committee for a Constructive Tomorrow (CFACT).

"... in the last few weeks and months there has been a rapid collapse in the global warming chimera so while we still have our freedom, let us speak out."