&#62; With respect to the polar bears, I searched around and found many articles which state that the population in the 60's had been diminished because of hunting and that, currently, the plurality of polar bear populations are in decline because of climate change.<p>I note that you didn't mention the relative sizes of these changes, the former being &#62;4x while the latter is close to the margin of error.<p>Then again, doing so doesn't fit your beliefs.