当跨境环境损害的结果是由一国管辖范围内的私人行为引起时,国家如果没有尽到“适当的注意义务”防止侵害行为的发生或惩罚行为者,就要为这些行为所造成的损害后果负责。本文首先将追寻“适当注意义务”在国际法律文件及国际实践中的体现,最后论述适当注意义务应当包括环境影响评估义务、告知义务、预防义务几项内容。 When the result of a cross-border environmental damage is caused by private conduct within the jurisdiction of a State, the State must do so if it does not “give due care” to prevent the occurrence of, or punish acts of aggression The consequences of the damage is responsible. This article will first pursue the embodiment of “proper duty of care ” in international legal documents and international practice. Finally, the dissertation on proper duty of care should include some contents such as obligation of environmental impact assessment, obligation of disclosure and obligation of prevention.