Thus most advanced countries have stipulated methods of controlling chemical products, estimating their danger, the paths by which they are released, and the proper dosages, and setting the scope for their use and permissible amounts within a safe range.
今天先進國家因此針對化學物質都訂有管理辦法，預估它的危害特性、暴露途徑、劑量等，限定使用範圍及安全容許量。