The report aims to examine the environmental threat as an extremely important factor in achieving environmental security. This goal is achieved by performing basic tasks related to terminological clarification of key concepts and the consequences of negative environmental impacts and damages on environmental protection. The research methodology includes the use of a systematic and comparative approach, the analysis and assessment of the impacts and on this basis conclusions are made for increasing the environmental security, both in a global aspect and in Europe, and in particular in the Republic of Bulgaria.