环境污染控制、集约化农业生产以及低硫高浓度肥料的使用，加剧了全球范围内土壤缺硫状况。
Pollution controls, intensified cropping, and the absence of sulfur from high-analysis fertilizers are combining to produce a growing worldwide deficiency in soil sulfur;
一直以来，农民在现有的耕地上精耕细作，使用了高浓度肥料与强效型杀虫剂，其中有不少是世界卫生组织禁用的。
As a result, existing agricultural land has been intensively farmed with strong fertilizers and pesticides, many of which are on the World Health Organisation's banned list.
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