Ecological diversity in Sunderban is at the threshold of decline. The fragile land here is being swallowed every day by gradual sea level rise, coastal erosion and tropical cyclones. Besides the global cause of sea level rise i.e. thermal expansion of sea water also responsible is the land degrading anthropogenic activity. An unsustainable situation has crept in the deltaic plain when natural capital is being used up faster than it can be replenished.