Corrections

The report shows that there is no doubt that climate change is occuring.

The report underlined this usiue with this words ''Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia.

The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen''.

At the beginning, the report explains that these informations based on the reports of the three Working Groups of the Intergovernmental Panel on Climate Change (IPCC).

Also, it is including relevant Special Reports.

The main factor is Anthropogenic greenhouse gas increase.

It is higher than before.

It occured by economic and population growth.

According to the report, this has led to atmospheric concentrations of carbon dioxide, methane and nitrous oxide that are unprecedented in at least the last 800,000 years.

This effects is harmless and this makes it the precursor factor of climate change.

Human causes the anthropogenic increase in GHG concentrations.

The report shows that human is the reason of average surface temperature from 1951 to 2010.

Thanks to the the IPCC Fourth Assessment Report the proof is increased.

I citationed a related part from the report.

The report includes a figure which shows Total annual anthropogenic greenhouse gas (GHG) emissions for the period 1970 to 2010 by gases.

This is a proof for this conclusion.