We didn't have guns 2000 years ago but people were in fact killed back then, therefore guns can't possibly kill people because people were killed before guns were around.
I think we can see the fallacy in that logic replace SUVs with guns and.....
We do affect the climate just as there is pee in your pool if I pee in your pool. The question is by how much and is that bad or good. The answer is more and more but more by .00000000001% can be an ignorable amount. Bad or good, well it was good that we prevented a new ice age but bad if we keep going to a possible tipping point where the end result means much less of the earth surface is feasible for humanity to live economically.
and in some cases the natives exterminated the herds -without- any help from anyone else. Sure there may have been an isolated incident where a food supply was targetted by europeans. But I can't find an actual incident of that recorded, and in all likelyhood the food supply was just as plausibly targetted by other natives.
Garg, perhaps you could peruse the following....http://www1.american.edu/ted/ice/buffalo.htm
Under the heading:
E. US POLICY TO EXTERMINATE THE BUFFALO
. Officers and enlisted personnel also killed buffalo for food and sport, though the impact of their hunts was minute when compared to the organized efforts of the professionals." (The Military and United States Indian Policy, p. 171) "In 1874, Secretary of the Interior Delano testified before Congress, "The buffalo are disappearing rapidly, but not faster than I desire. I regard the destruction of such game as Indians subsist upon as facilitating the policy of the Government, of destroying their hunting habits, coercing them on reservations, and compelling them to begin to adopt the habits of civilization."
Perhaps a better source of informationhttp://www.pbs.org/wnet/need-to-know/five-things/the-great-american-bison/8950/
I for one live 1/2 mile from one of the 5 great lakes. Until rain stops falling in the northeast of North America climate change won't affect me much. Sucks if you live on the ocean coast I guess or near a newly emerging desert...... I'm ok Jack, keep your hands of my stack!