not true at all.
volcanic and geological Co2 release is significant, but is relegated to the "baseline" because it is unavoidable, uncontroillable and inescapable.
without geological co2 releases co2 levels would be dropping due to photosynthesis and co2 sequestering by coral growth and whatnot. without human co2 emissions co2 levels in the atmosphere would hold steady or very gradually drop.
the fact remeains that between geology microbial action and other "natural" sourtces of co2 human co2 emissions are pretty small, but since co2 levels ARE rising ever so slowly, and we cant stop swamps from decomposing dead plant material or prevent the earth from offgassing, or prevent termites from farting, human co2 sources are the only thing in our control.
the numbers:
human sources of co2: 29 gigatonnes per annum on average in 2009.
"natural" sources: 750 gigatonnes per annum on average in 2009.
source:
http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch7.html
the importance of the tiny increase in global co2 levels and it's possible effects are the bone of contention, but the fact remeains "natural" co2 production exceeds human co2 production by an enormous margin, and thats a FACT.
the reason the 1970's global ice age scare is relevant is because the SAME people who were making that claim are making this new claim, using the SAME evidence to sell two fundamentally different hypotheses, theres one guy in paarticular who's name is escaping me, but in the 70's he was shouting from the rooftops, going on network tv and predicting a frosty doom for us all within 30 years, then just a few years later he started shouting an opposite doomsday scenario with even less cause.
if the climate clowns want people to take your ideas seriously, how about NOT using fabrications and lies to bolster their claims?
when the fabrications are revealed it undermines their position and makes people angry, and as a result a great deal of anger is also leveled at the cassandras who repeat the lies based on their trust of the climate clowns and their shitty "science"
also, consensus still does not make for scientific fact. we cant all vote for mars to have a breathable atmosphere and expect the universe to comply.