Water covers 70% of our planet, however, only 2.5% of the world’s water is fresh water, and two-thirds of that is stored in frozen glaciers or otherwise unavailable for use. Another 30% of all fresh water is groundwater, stored deep beneath the earth's surface in underground aquifers. That leaves only 1.3% of the total fresh water supply on earth in surface water sources such as lakes, rivers, and streams. It is this surface water humans and other species rely upon for their primary needs.
As a result, some 1.1 billion people worldwide lack sufficient access to fresh water, and a total of 2.7 billion deal with scarcity at least one month per year. This results in inadequate sanitation, stagnant growth of agriculture and increasingly stressed ecosystems. Rivers, lakes and aquifers are drying up or becoming too polluted to use. More than half the world’s wetlands have disappeared. At the current consumption rate, this situation will only get worse. By 2025, two-thirds of the world’s population may face water shortages and ecosystems around the world will suffer even more.