From Charting Our Water Future: Shows percentage of water shortage (or surplus, in some cases,at left) nation-by-nation in business as usual water use projections to 2030. The report shows where improvements in supply and demand efficiency could occur in several case study nations. India as an example is illustrated in the chart below.
"Competing Demands for Scare Water Resources May Lead to an Estimated 40 percent Supply Shortage by 2030"
--Charting Our Water Future from 2030 Water Resources Group
McKinsey Water Initiative Page
2030 Charting Our Water Future Project page and links to PDF files of report:
Bloomberg: Countries Can Meet Water Needs at Reasonable Costs, Study says
"Countries facing a rising gap between water supply and demand can meet their needs at a reasonable cost by combining efficiency in agriculture and industry with economic policy changes, a new report shows. Water requirements are expected to be 40 percent more than accessible supply by 2030, according to the study, which was published today by a group of organizations including the World Bank and Coca-Cola Co. Still, stakeholders can avoid energy- intensive solutions such as desalination, which would add billions of dollars in infrastructure expenses every year, it said...."
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Energy Productivity: The water availability project is similar to an ongoing McKinsey project showing how energy productivity can reduce future energy demand. Both projects use similar curves, the energy productivity curve is similar in appearance to the energy productivity curve.
From Water Report Executive Summary: The water availability cost curve for India, e.g. below, shows that changes in water supply/demand on the chart's left side (below zero) make money. Other countries are also studied in the report.
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