As I said, ant, I note that you ignore science, but I will post Professor Robert Carter’s pertinent comment on AGW again. You have seen it before:
“" our most accurate depiction of atmospheric temperature over the past 25 years comes from satellite measurements rather than from the ground thermometer record. Once the effects of non-greenhouse warming (the El Niño phenomenon in the Pacific, for instance) and cooling (volcanic eruptions) events are discounted, these measurements indicate an absence of significant global warming since 1979 - that is, over the very period that human carbon dioxide emissions have been increasing rapidly. The satellite data signal not only the absence of substantial human-induced warming, by recording similar temperatures in 1980 and 2006, but also provide an empirical test of the greenhouse hypothesis as understood by the public - a test that the hypothesis fails."
Bob Carter http://www.telegraph.co.uk/news/main.jhtml;jsessionid=ZUVPX02KD1UHZQFIQMGCFFOAVCBQUIV0?xml=/news/2007/04/08/nrclimate08.xml&page=2

Leo, there have been several major papers written by climate scientists in 2014. Your Carter does not stand up to NOAA, NASA or the Royal Society of Science.The American NCA document was also significant, having been referenced by 3,000 papers. Some of those papers have multiple authors. But, you know better than all those scientists, Leo.

Leo
In reference to professor Salby, It is easy to show that the increase in CO2 levels is not due to natural causes and demonstrate he is wrong.

1 The Increase in CO2 equals human emissions plus natural emissions less natural uptake.
or
CO2' = Ea + En – Un

2 So it must also be true that natural emissions less natural uptake equals the increase in CO2 level less human emissions.
Or
En - Un = CO2' – Ea

Unfortunately we do not know the values of natural emissions or the rate of natural uptake with any certainty, but we do have a good estimate for how much CO2 humans have produced and the current level of CO2 in the atmosphere.
Or
CO2' – Ea= a positive know value

We know from observation that the increase in CO2 less human emissions is a positive value. Therefore natural emissions less natural uptake is also positive and natural uptake must be greater than natural emissions.
Or
CO2' – Ea= positive then En – Un must also be positive.
And En>Un

Therefore it is certain that humans are responsible for all the increase in CO2 emissions since we have had reliable measurements of the CO2 levels (1958)

Further to the above we also know that the level of CO2 in the ocean has increased and also plants take up more co2 when it is available. So the claim that nature is responsible for the increase in CO2 levels is not credible to begin with.

Correction to last post
last equation should read

We know from observation that the increase in CO2 less human emissions is a negative value. Therefore natural emissions less natural uptake is also negative and natural uptake must be greater than natural emissions.

Or
CO2' – Ea= negative then En – Un must also be negative.
And Un>En (natural uptake greater than natural emissions)