Now now... who is heating up the planet?

The sun is, according to these articles:

• Days of Sunshine
  The Earth has certainly warmed in the last 100 years, although not as much as suggested by the IPCC. However, the Sun has also been hotter during the same period, so that some, if not all, the warming is attributable to the more intense solar activity this century and to the shortening of the solar cycles themselves.
  
  If indeed there has been warming, it is clear the Sun did it, not mankind or greenhouse gases.
  


• Correlation Between Temperatures and CO2
  (A Shot in the foot by the IPCC and UNEP)
  Very Short Conclusion
  
  1. Correlation between CO2 and global temperatures is clear – but only in some part of the world's climatic history – and the attribution of "cause and effect" was done backwards: temperatures seem to drive CO2 levels, and not the opposite as the IPCC and the "warmers" claim.
  
  2. Correlation between solar cycles and temperatures on Earth have been proved beyond any doubt.
  
  3. The trend toward warming is driven by another cause, and not by atmospheric CO2 levels, since carbon dioxide levels rose uniformely during 30 years between the years 1947-1977, mean global temperatures went their own course, totally ignoring carbon dioxide levels.
  
  4. All this nonsense of man-made global warming through CO2 emissions are based in a huge amount of unknowns, ambiguities and uncertainties found in the so called General Circulation Models (GCM), an issue too well known as to be treated here. However, if you have an inquiring mind, or still have some doubts about their validity and usefulness, please read the excellent scientific paper by Dr. Willie Soon, Sallie Baliunas, Sherwood W. Idso, Kirill Ya. Kondriatev, and Eric Postmentier, “Modeling climatic effects of anthropogenic carbon dioxide emissions: unknowns and uncertainties,”.
  


• Consensus Shattered As Major Scientific Study Says Global Warming Is Natural
  The so-called scientific consensus that global warming is man-made has been shattered with the release of a major new study backed by three universities which concludes that climate change over the past thirty years is explained by natural factors and that attempts to reduce carbon dioxide emissions are irrelevant.
  


• The truth about global warming - it's the Sun that's to blame
  Global warming has finally been explained: the Earth is getting hotter because the Sun is burning more brightly than at any time during the past 1,000 years, according to new research.
  


• The Sun is More Active Now than Over the Last 8000 Years
  The activity of the Sun over the last 11,400 years, i.e., back to the end of the last ice age on Earth, has now for the first time been reconstructed quantitatively ...
  

More in general, there are some who strongly oppose the idea of man-made global warming:

• This site is a great source of nice, intelligent discussions


• A blog "CARBON MYTH: TRUTH THRU REPETITION"
  Earth heating and cooling is a natural cycle. Human is a tiny thing in the universe that existed in a short period of time. We can not be considered to be in a group-of-small-things so as to cause global warming.
  
  


• The Courage to Do Nothing
  Science does not advance by majority vote; it is, in fact, precisely the dissenters -- Galileo, Darwin, Einstein, Heisenberg -- who produce the truly new science. The vast majority of dissenters are inevitably going to be wrong; but the vast majority of scientific breakthroughs nevertheless come from dissenters. This apparent contradiction is essential to understanding the history of science.
  
  The problem is that the UN's IPCC is not a scientific body; it is a political body, controlled by diplomats and politicians and operating under political rules