Global warming is a real problem.
全球变暖是个确实存在的问题。
Environmentalists fear that this is a shortsighted approach to the problem of global warming.
环境保护主义者们担心这会是解决全球变暖问题的一个目光短浅的方法。
On the one hand, global warming is, as its name suggests, a global problem.
一方面，全球变暖，从名字可以看出，是个全球性问题。
Global warming is adding to the problem.
全球变暖使得问题更加严峻。
Global warming may be the most serious global social problem threatening life on Earth.
全球暖化可能是最严重的全球性社会问题，威胁着地球上的生命。
Guess global warming was a problem back then, too.
有人猜测全球变暖也可以追溯到那个时候。
The book was trying to stimulate discussion of the problem of global warming.
这书试图激起人们对全球变暖问题的讨论。
Global warming is a dramatically urgent and serious problem.
全球变暖是当下非常紧急而严重的问题。
Scientists say that global warming is a dangerous man-made problem.
科学家们说过，全球变暖是人类造成的危险问题。
In 21st century, however, the most serious problem must be the global warming.
然而在21世纪，最严重的问题一定是温室效应了。
Global warming may be a big problem, but we can all help stop it.
温室效应也许是一个严重的问题，但我们都能为阻止它作出贡献。
Global warming may be a big problem, but we can all help stop it.
温室效应也许是一个严重的问题，但我们都能为阻止它作出贡献。
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