@wundayatta “We don’t know whether the current changes are good or bad for humans.””
I think ÿou’re either defining “know” at a threshold level where nobody can be said to know anything, or you might be defining good or bad at time scales that gloss over impact on current generations, or perhaps you’re confusing “We” for “I”. No major review of the scientific evidence has ever come close to conlcuding that unrestricted increases in greenhouse gas emissions and associated increases in global temperature, ocean acidity, climate instability, sea level rise, etc. might be “good” for humans. Not the Stern Report, IPCC fourth Assessment report, the Garnault report, or for that matter any recent joint statement by the world’s national academies of sciences.
“Is species die out bad? I don’t know how we can know for sure.”
Yes, it’s bad, because it limits human options. Is the loss of a global fishery not bad?
“Maybe it’s nothing new.”
It isn’t. There have been five major mass extinctions in the last 550 millions years (the period we have adequate fossil record data to answer the question). But “not new” doesn’t equal “good” for us. Genocide is nothing new either.
“Maybe entire new sets of species will appear as suddenly as those disappearing now are disappearing.”
No. Species appearance in the fossil record takes place on evolutionary time scales. Extinction can take place on decadal time periods or less. Rates of specication vary, but they are still orders of magnitude removed from the rates at which we can wipe them out.
“Is species die out a result of climate change or a result of human activity?”
False dichotomy. However, the current rate of species loss is estimated to be approximately 100–1000 times the natural background rate of extinction. Most of this recent loss is do to loss or degredation of natural vegetation (ie due to agriculture, urbanization, forestry), introduced species, overharvesting, pollution, etc. Predictions for this century are for a dramatic increased loss of species already vulnerable to extinction because of these existing processes, and additional species being lost primarily due to the impacts of climate change.
google “SPECIES SUSCEPTIBILITY TO CLIMATE
CHANGE IMPACTS”. It’s a relevant report from the IUCN
“If we stopped warming the planet, would species stop dying out?”
No. Continued species loss will occur because of continued human population growth and continued increased demand on global resources. But the vast majority of the world’s governments have agreed that such rates loss are unexceptable and have agreed that biodiversity loss is bad for humanity, hence the ratification of the CBD by 150 countries.
http://www.cbd.int/convention/
“I doubt if anyone could say that for sure”..in reference to species dying out.
I think there is a vast amount of knoweldge out there that you seem unaware of.
Here’s a decent starting point.
http://en.wikipedia.org/wiki/Ecosystem_services
“Humans are a very successful species. They will not voluntarily dies themselves out.”
You might want to read Collapse by Jared Diamond.
“Maybe it will hurt us. Too bad. But I make no excuses for saying I really only care for what is best for humans.”
That sounds mutually contradictory. Regardless, if you care what’s best for humans then you should care about humanity retaining a global climate which is consistent with that for which civilization developed. Anthropogenic climate change isn’t conducive to that. Neither is species loss generally good for humanity.
“I care about animals and the environment only insofar as if facilitates the perpetuation of the human species.”
You’re not alone. BUt if you’re going to take that stance then that only serves to emphasize rather than deemphasize the importance of nature.
Humans are incredibly adaptable. Can the human species survive trashing much of the planet? I think so. But I see no reason why we should be setting the bar so low as to to aim for mere survival.