这种商业模式有很大的缺陷，如果谷歌和其他搜索引擎的用户投诉搜素结果有遭污染，他们将严厉打压劣质内容和垃圾邮件。
This business model could be dented badly if, as seems likely, Google and other search engines crack down hard on poor-quality content and spam that their users complain are polluting search results.
气侯模式的改变会让一些人口稠密的地区面临特大洪灾的危险，伴之而来的是食物和水源的污染。
Changing weather patterns may also put densely populated areas at risk of deadly flooding, along with the resulting contamination of food and water supplies.
最近有关控制氯化污染物成本的研究进一步证实了对环境管理成本做过高预计的这一模式。
A recent study of the costs of controlling chlorinated pollutants confirms the pattern of advance overestimation of environmental management costs.
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