Except that in earlier epochs, the Earth was indeed much hotter than today etc. So, climate-change could easily harm humanity.
The very concept of Changing climate in the context of the man made global warming myth is a reduction ad absurd-um.....and it frustrates me to no end that even among very highly intelligent people that such a myth is accepted unquestioningly.... This does not mean that I claim to Know for sure that human efforts have no effect on earths climate.....only that I am agnostic about how the effects will ultimately turn out....I rebuke anyone who claims to have such knowledge that proves that human CO2 or Bovines methane effects are entirely negative, and if not stopped will inevitably lead to a doomsday scenario.
The great oxygenation event which happened completely devastated the dynamic of life on earth, and from a climate changer perspective it was all doom and gloom, but out of the sea of suffocated primitive forms the conditions where ripe for the expansive evolution of newer oxygen tolerant species which eventually gave rise to the highest forms of life to ever live on this world.....
My point is that cow methane is negligible in its effects on the earths climate, and if anything it is beneficial. The great herds of mega Fauna and wild beast of all shapes and sizes terraformed the land and aided in the creation of the lush ecosystems which nourished and gave rise to Human Kind.
It becomes clear when you study in depth the epochs of earths evolution from a climate change perspective and you will see remarkable and dramatic changes, and yet for the most part life has always found away to keep the earths atmosphere within a life supporting homeostasis.
Before vertebrates even began to crawl out of the ocean the atmosphere was much higher in CO2 than it is today...The early vegetation sprawled out onto the land before the mold and fungal lifeforms evolved the capacity to breakdown tough plant fibers....so the early primeval Forrest were filled with dead vegetation that wouldn't rot....some would turn to tar and seep into the earth, or be compressed into coal.... there were most likely great fire events in which large portions of the land when hit with drought would burn releasing great amounts of CO2 back into the air....
Through the epochs the ebb and flow of organic evolution working in sync with the carbon cycle and many yet unknown subtle undercurrents of synchronicity has maintained the habitability of the planet...even through the past mass extinction events which were much more disastrous than the slow release of the earths stored CO2 into the atmosphere through the burning of fossil....
From the perspective of a truly open mind Its just as likely that our release of the CO2 back in to the atmosphere could be offsetting the next ice age, as it would be to cause a water world scenario... An Ice age could be be just as bad if not far more devastating to humanity than global warming....and so I conclude that from this latitude my attitude is that Global Warming is nothing to worry about....
It's not a cow fart that is dangerous but when you take a billion cow shits and put them in a vat that is not natural and the organisms that live off of the methane would likely be killed by the anaerobic toxic sludge that results from your average intensive livestock operation in the industrialized nations. Also in much of pasture land there is a deficit of fresh carbon to the amount of nutrients in the soil because pastures are overgrazed and under rested. If pastures are allowed to recover then grasses have increased carbon production and thus more consistent cow poops and more earthworm food. It should be farmers goal to waste 30% of their pasture to mulch the next crop in order to retain and increase fertility and forage quality.
If you look at the Potenger's cat's study, the feces from the unhealthy cats produced unhealthy plants. I imagine it is largely the same with cattle.
These concerns are more localized problems with modern livestock management, not the bigger picture global methane non sense and I agree that there are huge ecological problems with whats going on. Vast stretches of land are being over grazed, over cut for hay, and are void from the variety and diversity of wildlife which once managed the earths resources in accordance with the natural order.... also even larger amounts of land are being destroyed by big agra crops which are used to feed both humans and livestock...these vast areas of mono crop land are becoming wastelands... and are indeed weakening the earths vitality and ability to re balance itself to offset the effects of human activity.....
Still I insist that the earth mother is much stronger than we give her credit for...and if the great apes become to much of a nuisance she will dispense with the appropriate disciplinary measures.....then after being God Smacked through the times of tribulations a point will be attained of such newly acquired wisdom and this will begin to work through us, as it works through all earths creatures in a way that will bring about spontaneous evolution in understanding without the need for all the extraneous and ineffectual measures being concocted at the international climate talks.