在始于本世纪60年代的环保浪潮的影响下,美国将若干种常见矿物,包括6种石棉类矿物和3种硅酸盐矿物(石英、方英石和磷石英)列为有致癌嫌疑和导致石棉沉着病及矽肺病等非恶性慢性病的物质。对过去在高粉尘条件下作业的许多厂矿来说,采取较严格的粉尘控制措施肯定是必要的。然而,政府机构新近颁布的许多法规规章过于严格,其指导思想是“无人知 Under the influence of the environmental protection wave that began in the 1960s, the United States classified several common minerals, including six asbestos minerals and three silicate minerals (quartz, cristobalite, and lucite) as suspects of cancer and caused Asbestos stasis and silicosis and other non-malignant chronic diseases. For many factories and mines that used to operate under high dust conditions, it is certainly necessary to adopt stricter dust control measures. However, many regulations and regulations recently promulgated by government agencies are too strict. The guiding ideology is "no one knows