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MENAFN - Khaleej Times - 24/03/2014
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(MENAFN -Khaleej Times) surging populations and economies in the developing world will cause a double crunch in demand for water and energy in the coming decades the un said on friday

In a report it said the cravings for clean water and electricity were intertwined and could badly strain earth’s limited resources.



“demand for freshwater and energy will continue to increase over the coming decades to meet the needs of growing populations and economies changing lifestyles and evolving consumption patterns greatly amplifying existing pressures on limited natural resources and on ecosystems” the report said.


Already 768 million people do not have access to a safe reliable source of water 2.5 billion do not have decent sanitation and more than 1.3 billion do not have mains electricity.


“lack of access to water sanitation and sustainable energy is an aggravating factor for poverty” michel jarraud secretary-general of the world meteorological organisation told a conference at the united nations university in tokyo.


“we need to adopt more integrated policies and innovative strategies to tackle the issues.”


About 20 per cent of the world’s aquifers today are depleted according to the un report.


Agriculture accounts for more than two-thirds of water use.


The world water development report the fifth in the series by the un educational scientific and cultural organisation (unesco) is an overview collated from data from scientific studies and investigations by agencies.


It said ever more freshwater will be needed for farming construction drinking cooking washing and sewerage but also for energy production — 90 per cent of which uses water-intensive techniques today.


The report gave this snapshot of the future:


— global water demand is likely to increase by 55 per cent by 2050.


— by then more than 40 per cent of the world’s population will be living in areas of “severe” water stress many of them in the broad swathe of land from north africa and the middle east to western south asia.


— asia will be the biggest hotspot for bust-ups over water extraction where water sources straddle national borders.


“areas of conflict include the aral sea and the ganges-brahmaputra river indus river and mekong river basins” said the report.


— global energy demand is expected to grow by more than a third by 2035 with china india and middle eastern countries accounting for 60 per cent of the increase.


— in 2010 energy production gobbled up 66 billion cubic metres of fresh water — more than the average annual flow of the river nile in egypt.


By 2035 this consumption could rise by 85 per cent driven by power plant cooling systems that work with water.


Shale deposits and tar sands driving an energy boom in north america are especially hefty in their demands for water to force out the precious gas and oil the report said.


Even so “they are outstripped by far by biofuels” said researcher richard connor who headed the study.


Renewable sources like solar and wind energy that use far less water are gaining ground and accounted for about a fifth of global electricity output in 2011 the report said.


But they are unlikely to expand this share significantly if fossil fuels continue receiving the bulk of subsidies it said.


 






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