In scary Mad Max-esq times ahead, the most essential natural resource will probably be water, not oil. Vast underground aquifers lie hidden across the globe. The problem is that these crucial sources of fresh water cross national boundaries, setting up the potential for conflict over their control at virtually every transnational border on the planet. With this fear in mind, the United Nations' UNESCO has completed a "blue gold" map resulting from a decade of work between numerous countries. The hope is that by revealing the layout of the Earth's large hidden deposits of water, the way will be paved to international law governing how water is shared between adjoining nations.
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