These days with rain and wet upon the water and its usefulness, so I thought I'd try a little 'interesting ideas about it and I found various projects and eco-sustainable ideas.
water, you know, is a vital irreplaceable, many researchers are working on various projects to conserve, recycle and purify water. Let's start with small-scale ideas, such as purifying water C-Water Gao Chao of the designer that uses a technique of filtration of water through evaporation and condensation, using the sun's rays.
C-Water is an object equipped with thin shell, you can float on the water of the sea, where at one end enter the water which evaporates with the heat of the sun, creates droplets of condensate that is collected from the section, accordion, which in turn lowers the water in the special section. It can also be compacted to other C-Water to get a larger tank. 
simple idea that has won the second prize all'IIDA, the ' Incheon International Design Awards 2010, held in Incheon in South Korea, could become almost a survival kit for travelers.
But talking about water purification devices on a large scale.
must be said that a very important aspect to consider when it comes to water, is one of the underdeveloped countries, where there is careful research by scholars and designers time to find a way to provide water.
Savior Bud designer Kim Hyo Sun and Seol Ah, is a system of water collection and purification of the same from the leaves of the trees.
Presented at the Seoul Design Fair 2010 is designed especially for Africa, where the water that is not usable. 
Savior Bud is attached to the ends of tree branches and leaves as he closes the pliers, making a mini greenhouse. The leaves should be of a large, moisture issued by them in 4 hours to fill a cup of water, just like a faucet, turn the bottom of the device to lower the water.
Rain Drops Another system is the designer Evan Gant, which collects and purifies rainwater.
In underdeveloped countries is extremely important to have clean water available, because they wash their hands in those countries can reduce the mortality rate, which comes very often from diseases transmitted by infected water.
Rain Drops, collects rainwater from the eaves of the roof with a simple bottles in plastica (PET), un sistema semplice ma ingegnoso. Le bottiglie vengono attaccate a dei beccucci in plastica che sono collegati alle grondaie, così l'acqua scende direttamente nelle bottiglie.
E da qui inizia la purificazione, perchè l'acqua trovandosi nelle bottiglie di plastica è sottoposta al processo SODIS (solar water disinfection), cioè viene disinfettata dai microorganismi patogeni grazie al calore e ai raggi UV del sole.
Il metodo SODIS, rispetto ad altri metodi di purificazione dell'acqua, è quello che presenta numerosi vantaggi, sia dal punto di vista economico dato il bassissimo costo, quasi nullo, sia dal punto di vista maintenance is not necessary, it is extremely easy to use, does not depend on machines, and is useful in remote areas.
Rain Drops was the winner of idea Design for Poverty Then we IARA, a system of supply of drinking water, designed by Design study Baita, which collects and purifies' making drinking rainwater, using the evaporation system.
impractical to collect the dirty water in five bottles outside, and on evaporation and condensation purifies the water that is then placed in the middle bottle. 
Adottando foglie larghe come quelle di banano, si può avere maggior raccolta di acqua piovana.
Iara può essere anche trasportabile come un trolley, comodo per spostarsi a grandi distanze.
E concludo con una simpatica performance sul riciclaggio delle bottiglie in PET che Stuart Haygarth ha realizzato per Design Miami 2007.
Si tratta di "Drop", un lampadario realizzato con basi di bottiglie di plastica di acqua raccolte nell'aereoporto di Stansted a Londra; in tutto circa 1800 bottiglie.
L'artista ha voluto sottolineare l'aspetto del riciclaggio, creando un'opera made up of hundreds of empty plastic bottles we leave everywhere, and points out that plastic bottles are now "litter" (elements of contamination) of our landscapes.
To achieve Drop Chandelier, Haygarth has cut the base of many bottles, then put them in a container containing cement and sand and water through a process has obtained a sandblasted plastic with frosted glass effect. 
The implementation performance has been exhibited in several exhibitions with the participation of the public who helped to leave their empty plastic bottle
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