It is difficult to perceive of life without water‎.‎ Hence the availability of water‎,‎ in right quantity and quality‎,‎ is essential for the survival of human civilization‎.‎ Oceans represent ninety seven percent of total water on earth‎,‎ but the seawater is not directly usable‎.‎ The balance three percent consists of freshwater‎,‎ but again most of it is frozen ice in the arctic poles or in the glaciers on the mountain‎.‎ Only three percent of total freshwater that flows in the rivers‎,‎ lakes‎,‎ and swamps are available to human use‎.‎ Water being so vital for life to grow food‎,‎ to run industries and to save the environment‎,‎ the sustainability of water resources must be reviewed and strategised with a global overview‎.‎ Thus‎,‎ the concern for water is now very widely shared among all nations of the world in the impending scenario of global warming‎.‎ Hence‎,‎ the readership should likely be distributed among the environmental activists to the national and international policy makers‎,‎ including all enlightened citizenry of the world‎.‎ Universities‎,‎ research institutions and socially‎-inspired NGOs and students at graduate and undergaduate levels will find much food for thoughts in this strategic review of global water resources‎.‎