Abstract Environment is a self sustained system of all living and non-living things occurring naturally on earth in which living components interact among themselves and with non-living components in the presence of solar energy, without human intervention. Any kind of deterioration of environment either through depletion of resources or adding undesirable substances into it resulting in destruction of habitats and loss of biodiversity is considered Environment degradation. Accumulation of greenhouse gases in atmosphere is one of the major causes of Environmental degradation which results in global warming. There are manifold gradual effects of global warming which will get manifested with great intensity in coming centuries. In this paper we have highlighted how Environmental degradation and global warming have posed a serious threat to the sustenance of life on the earth by intensifying the magnitude and occurrence of abrupt climatic changes. The warming of oceans and the atmospheric system has aggravated the danger of complete shutdown or modification in the pattern of oceanic currents and the global conveyer belt. Oceanic currents and global conveyer belt play a dominant role in the redistribution of temperature on the Earth and determine the climate of many of the Earth’s natural regions. Complete shutdown of conveyer belt may cause major regional and global climatic shifts in just a few decades or even in a single year.