UNDATED Two new NASA studies are raising alarm bells about global warming.
Scientists say there is a decline in the amount of arctic sea ice in the winter. Their findings also show the decline is occurring at a faster rate.The changes could have an impact on wildlife and people living in the arctic region.Mark Serreze (suh-REHZ') of the National Snow and Ice Data Center says "there are very strong concerns now about the eventual survival of polar bears." He says the loss of sea ice means the animals will have a harder time surviving.Serreze also says villages along coastal Alaska and Russia might have to be evacuated because of erosion.
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