OK, but if you consider that the many species, not just polar bears, are endangered because of our actions and that a lack of action to save them will inevitably lead to their extinction, do you not think that we have an inherent responsibility to do what we can to protect them?
I'm not arguing that we should move polar bears to Antarctica, but I am concerned by the idea of simply leaving species to sort themselves out in the hope that they can adapt to their new environment that we have so kindly altered for them... We've put the world's flora and fauna in a position where many species simply cannot sustain their populations. Plus we have altered the climate so that optimal habitat conditions are no longer present in the historical locations where species thrived.
I struggle with the idea that we just leave species in the hope that they adapt to their new environment or migrate into new, more suitable habitats, when it is our fault that they are in this situation in the first place and we have the ability to help them. Or is that just life? We've made our bed, now the rest of the world's biota must sleep in it. Survival of the fittest.