There is nothing unusual about current climate and today’s warming is not significantly different from past warming eras.

Earth and its oceans have be coping with prodigious quantities of carbon dioxide from volcanoes since the world began. Oceans are not threatened by carbon dioxide – they are very efficient at removing excess carbon dioxide into massive deposits of limestone and other carbonate rocks.

Earth has about 1,000 active volcanoes above the sea and far more beneath the sea. Most measuring stations for carbon dioxide on land are sited near volcanoes, which makes calculations of figures on average atmospheric content suspect. It is likely to be lower than reported.

Even earthquakes release large quantities of carbon dioxide, and all of this carbon dioxide is identical to the small amount generated by puny humans burning coal, oil and gas.

Because these volcanic and earthquake releases of CO2 are not monitored and are identical to carbon dioxide formed by burning of hydrocarbons, there is thus no basis for estimating the proportion of CO2 attributable to humans. It is likely to be far lower than the computer models have assumed.

For a summary of these matters by Professor Plimer see his presentation to the European Institute for Climate and Energy, December, 2010: