Even if it is warming there is no real evidence to link it with man. The last interglacial was warmer than it is now and there was no cars or man made cities then. The ice cap in the North Pole was reduced to hardly any as the Southern part of the North pole was "open park grassland" (grassland interspersed with some forested areas) that supported large grazing animals.
This means there was less ice there than there is now for a longer period of time. So even if the ice is melting that is nothing new. The polar bears now number over twice as many as there were when they got put on the endangered species list and are overpopulated for the little area they inhabit so for them to try to find enough food to feed themselves is hard. Of course they are starving and trying to wonder off and spread out to a wider range. This is what happens when any species is overpopulated past what the known range can support.
So is all of this proof of man made global warming? No! In fact are we sure the earth is really even on a real warming trend? No!
Not all that long ago (circa 1300 - 1870) we had a cold spike called the little ice age.
It caused crops to fail through most of Europe and lots of people lost there lives. so just because we are getting warmer than it was since 1870 doesn't mean we are doing anything but getting over a cold spike. The weather swings back and forth, this is called a natural cycle and there is no way anyone knows for sure if it will be warmer or colder for a longer period next. Period.
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Noah was the first snake collector. ~Eric~

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