I have read all comments posted with much interest. There has been only one reply that has been influential and informative. Global Warming is an emotive issue and its fires are stoked by politicians and their greed. We should do all we can to look past their greed.
The one factor, which is the most important, seems to have been overlooked. The Earth is more than capable of looking after itself. We are all Emmets (little ants) in the grand scheme. Crucial to this is the Earth's ability to restore its balance, whilst still remaining in productive chaos. There are positive and negative feedback mechanisms in play that operate for every nanosecond that we waste our emotions in worry.
I have not read one mention of increases in the water and carbon cycle with direct regard to increased deep sea carbon burial, the importance of the Tibetan Plateau, chemical weathering of siliceous lithography and atmospheric carbon drawdown. Not one mention of the importance of upland areas in the Holocene or geographical distribution of plate tectonics. Not one mention of sun spot cycles, paleo-magnetic origination or planetary pole flip. Not one mention of Milankovich cycles, delta carbon13 correlations or oxygen18 indicators. All of these are of vital importance in any warming debate. (I ain't never heard a politician mention them either).
My advice to the readers would be not to worry about such a trivial thing as perceived human atmospheric content intervention and advise you should all concentrate on more relevant matters. Mother Earth is billions of years old and she has billions to go.. she will still be here when the human species has evolved upwards or destroyed its trace completely. She doesn't need or want our help.
Power to the people!!!

W