产生干扰的原因很多，但接地问题是主要的原因之一。

Nevertheless, one of the main reasons consists in earthing problems.

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土壤磷素的农业非点源污染是导致水体污染的最主要的原因之一。

Soil phosphorus as agricultural non-point source pollution is one of the main factors which lead to water pollution.

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二氧化碳占大约70%的温室气体，这已经可以认定为导致全球变暖的最主要的原因之一。

CO2 makes up about 70% of the greenhouse gases, which is considered to be one of the greatest causes of global warming.

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