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The Intergovernmental Panel on Climate Change issued its fourth assessment since 1990 on the state of the global environment:

* Global atmospheric concentrations of carbon dioxide, methane and nitrous oxide have increased markedly as a result of human activities since 1750 and now far exceed pre-industrial values determined from ice cores spanning many thousands of years. The global increases in carbon dioxide concentration are due primarily to fossil fuel use and land-use change, while those of methane and nitrous oxide are primarily due to agriculture.

* Carbon dioxide is the most important anthropogenic greenhouse gas. The global atmospheric concentration of carbon dioxide has increased from a pre-industrial value of about 280 ppm to 379 ppm in 2005. The atmospheric concentration of carbon dioxide in 2005 exceeds by far the natural range over the last 650,000 years (180 to 300 ppm) as determined from ice cores. The annual carbon dioxide concentration growth-rate was larger during the last 10 years (1995 - 2005 average: 1.9 ppm per year), than it has been since the beginning of continuous direct atmospheric measurements (1960-2005 average: 1.4 ppm per year) although there is year-to-year variability in growth rates.

* The primary source of the increased atmospheric concentration of carbon dioxide since the pre-industrial period results from fossil fuel use, with land use change providing another significant but smaller contribution.

* The global atmospheric concentration of methane has increased from a pre-industrial value of about 715 ppb to 1732 ppb in the early 1990s, and is 1774 ppb in 2005. The atmospheric concentration of methane in 2005 exceeds by far the natural range of the last 650,000 years (320 to 790 ppb) as determined from ice cores. Growth rates have declined since the early 1990s, consistent with total emissions (sum of anthropogenic and natural sources) being nearly constant during this period. It is very likely6 that the observed increase in methane concentration is due to anthropogenic activities, predominantly agriculture and fossil fuel use, but relative contributions from different source types are not well determined

* Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global mean sea level.

Essentially, the IPCC puts the chances that Global Climate Change is occuring due to man-made carbon gasses at nearly 90%.

"In our daily lives we all respond urgently to dangers that are much less likely than climate change to affect the future of our children," said Achim Steiner, executive director of the United Nations Environment Program, which administers the panel along with the World Meteorological Organization.

"Feb. 2 will be remembered as the date when uncertainty was removed as to whether humans had anything to do with climate change on this planet," he went on. "The evidence is on the table."

Shall we get on with the difficult choices required of us to save the species?

You can read the actual report here.

Well after reading the entire IPCC report and looking at the evidence, I must say that is a bunch of junk science if I have ever seen it!! How the data has been so carefully manipulated to support their agenda. I am not a scientist but I do have some science in my background. The unknown affects of water vapour in their global warming gases data is truley disturbing as the most fundamental greenhouse gas IS water vapour. It is not suprising that it isn't in their data because it would show the very small contribution of human produced CO2 . Also there doubling of co2 emmisions in there climate models to have any reaction on the enviroment to post their catastrophic predictions is laughable if it wasn't so scary. So we have had almost 1 whole degree of climate change in the last hundred years, please spend the time on your own do some research and think on your own people. Do not believe the IPCC they are a political group and as all political groups they have an agenda. It is not to save the planet. Lets stop spending our billions of tax $ on junk science lets get the truth!!

The facts are nearly 100% that human activity is heating up the globe. Climate change is happening,and it is certainly due to human activity. Are we to do nothing? Our children would never forgive us...

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