Water is the stuff of life, too, but if you drink too much, too fast you die.
When 60 million bison were roaming the planet, they were roaming on native prairie, which is one of the most effective carbon sinks known to man. Now 99% of the tallgrass prairie, 60-80 percent of the midgrass prairie, and 40-60% of the shortgrass prairie have been plowed up, paved over, or otherwise destroyed. Pavement is not a carbon sink and farm fields are carbon sources. It is therefore ridiculous to claim that the farts of 60 million bison roaming intact native prairie would have the same effect as the farts of 60 million cattle fattening in feedlots (bare dirt is not a carbon sink either) on corn shipped in from across the county (releasing more carbon), or even across the country.
Moreover, the conversion of prairie to plowland following the destruction of the bison was one of the factors that raised atmospheric CO2 levels from pre-industrial levels of about 275-280 ppm in the mid 18th century to about 300 ppm in 1900.
Finally, volcanoes produce a typical min-max range of 65-319 million tons of CO2 per year, depending on the level of activity, compared to approximately 30 billion tons of CO2 per year from fossil fuel burning.
Volcanoes were major drivers of climate change at several points in the distant past, but that was during periods of much greater activity, as well as other significant differences, and the results, from a human perspective, were not necessarily pretty. They're one of the suspects in the biggest mass extinction ever, which wiped out 96% of all marine species and 70% of terrestrial vertebrates, and contributed to CO2 levels of about 1800 ppm in the Jurassic, a period in which much of what is now the continental United States was under water because there were no ice caps to speak of and sea levels were dramatically higher.
Maybe a little. Nature is conservative. It does not produce excess and profit. It only replicates itself infinitely. Excess and profit would be ok except it takes something to make something like resources, say the destruction of the rain forests. The primary function of corporations is to make profits for stockholders which is ever progressive more riches. What would be necessary is political and economic systems like nature, infinite.
The graph is interactive and shows CO2 oer capite vs GDP/capita on logerithmic scales - it's fun; have a play with it - press play in the bottom left to run it from the 19th century etc. Good site all round, this one.
I think slowing carbon production can take on a huge extreme. I think it's good when there are talks of reducing water pollution, planting more trees, and organic farming. The problems come in when the population control fans open their mouths.
There are people like Bill Gates (responsible for far more energy expenditure than average), who want to reduce the world's population. It's not the population that's the problem, it's the high ups wanting to control everyone else.