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Dahagan2
Joined: 18 Jul 2013
Posts: 5
Location: INDIA
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 Posted: Thu Jul 18, 2013 1:08 pm Post subject: Energy-efficient water purification |
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Water scarcity is a worsening ecological problem in many parts of the world due to competing demands from agriculture, cities and other human uses. Where freshwater systems are over-used or exhausted, desalination from the sea offers near-unlimited water but a considerable use of energy – mostly from fossil fuels – to drive evaporation or reverse-osmosis systems. Emerging technologies offer the potential for significantly higher energy efficiency in desalination or purification of wastewater, potentially reducing energy consumption by 50% or more. Techniques such as forward-osmosis can additionally improve efficiency by utilizing low-grade heat from thermal power production or renewable heat produced by solar-thermal geothermal installations.
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Athipthi
Joined: 22 Jul 2013
Posts: 5
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| Posted: Mon Jul 22, 2013 5:45 am Post subject: |
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While most iPhone users are aware of unofficial unlock methods, you may be surprised to discover that it’s possible to legally unlock your device, courtesy of Apple. The above image is the not-often-seen official unlock notification, as displayed in iTunes.
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