在加拿大和澳大利亚全球变暖的危害或许已经显现：一连几个暖冬造成了加拿大树皮甲虫成灾，旱灾和大火也使澳大利亚的森林屡遭破坏。

That may already be happening in Canada, where recent warm winters have unleashed a plague of bark beetles, and in Australia, whose forests have been devastated by drought and forest fires.

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根据一月份递交给爱荷华州立法院和管理人员的州气候变化报告中所述，2007的暴风雨极具破坏性，危害严重的暴风雨时常发生。

The 2007 storm was exceptionally damaging, but severe storms are becoming more frequent, according to a state report on climate change submitted in January to the Iowa Legislature and governor.

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为了降低地震危险性(一定地区在未来一段时间内可能发生破坏性地震的危险程度)和减少地震带来的危害，那么预测一下未来是否有一场大地震，它将在何时何地发生，这就显得很有必要。

In order to reduce the risk of an earthquake and reduce and mitigate its effects, it is necessary to predict where and when a future, large earthquake may occur.

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