Security is the ultimate quest for all. It is a universal experience and constant preoccupation of mankind in its individual, social and corporate existence. Environmental security has introduced an interdisciplinary perspective into security studies. Environmental security encompasses the interactive dynamics of the diverse human and natural networks that constitute the modern world. Bangladesh is one among the most vulnerable places on the earth in the terms of its geography, resources, location and its physiographic landscape. Bangladesh is extremely vulnerable to non‐traditional security threats that include food and water security, health security, environmental security, illegal migration and human trafficking and transnational crime and transnational terrorism, among others. Environmental factors also have the potential to play a debilitating effect on the domestic politics of Bangladesh. This can upset domestic power balances and cause political instability. The greater degradation in geography of Bangladesh the greater will be the political and economic deterioration, thus leading to more national and international insecurity.