题目内容

Changes in climate that had already taken place are manifested 1from the decrease in extent and thickness of Arctic sea ice, perma- 2frost thawing, coastal erosion, changes in ice sheets and ice shelves, altered distribution and abundance of species. 3Nowadays snows melt earlier in the springtime. Lakes, rivers and bogs freeze much more later in the autumn. Reindeer herding 4becomes more difficult so the ice is weak and may give way. 5Nowadays winters are much colder than they used to be. 6Occasionally during winter time it rains. We never expected this;we could not be ready for this. It is very strange. The cycle of the yearly calendar has been disturbed greatly. Warming over northern land areas has been very greater than elsewhere in the world. The 7changes are due to human modification of the concentration of greenhouse gases during the 20th century, leading quite directly to the projections the Artic will warm by several times as much during the 8
21st century as it did during the 20th century. The amplified warming in Arctic, in turn, directly contributes to overall global warming, as 9well as cause changes that create impacts over the rest of the globe. 10

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21st century as it did during the 20th century. The amplified warming in Arctic, in turn, directly contributes to overall global warming, as 9

well as cause changes that create impacts over the rest of the globe. 10

Now, it is clear that the decline of a language must ultimately have political and economical causes: it is not due simply to the bad 1influence of this or that individual writers