Global warming is a trend toward warmer conditions around the world. Part of the warming is natural; we have experienced a 20,000-year-long warming as the last ice age ended and the ice ___36___ away. However, we have already reached temperatures that are in ___37___ with other minimum-ice periods, so continued warming is likely not natu-ral. We are ___38___ to a predicted worldwide increase in temperatures ___39___ between 1℃ and 6℃ over the next 100 years. The warming will be more ___40___ in some areas, less in others, and some places may even cool off. Likewise, the ___41___ of this warming will be very different depending on where you are-coastal areas must worry about rising sea levels, while Siberia and northern Canada may become more habitable and ___42___ for humans than these areas are now.
The fact remains, however, that it will likely get warmer, on ___43___, everywhere. Scientists are in general agreement that the warmer conditions we have been experiencing are at least in part the result of a human-induced global warming trend. Some scientists ___44___ that the changes we are seeing fall within the range of random variation-some years are cold, others warm, and we have just had an unremarkable string of warm years ___45___ -but that is becoming an increasingly rare interpretation in the face of continued and increasing warm conditions.
A) appealing
B) average
C) contributing
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