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2. Slingshot (water vapor distillation system) - Wikipedia

   en.wikipedia.org/wiki/Slingshot_(water_vapor...

   Slingshot is a water purification device created by inventor Dean Kamen. [1] Powered by a Stirling engine running on a combustible fuel source, it claims to be able to produce drinking water from almost any source [2] by means of vapor compression distillation, [3] requires no filters, and can operate using cow dung as fuel.

3. User review - Wikipedia

   en.wikipedia.org/wiki/User_review

   A user review of a product on Amazon.com. A user review is a review conducted by any person who has access to the internet and publishes their experience to a review site or social media platform following product testing or the evaluation of a service. [1]

4. Customer review - Wikipedia

   en.wikipedia.org/wiki/Customer_review

   The reliability of customer reviews has been questioned. [1] Abuses akin to ballot stuffing of favourable reviews by the seller (known as incentivized reviews), or negative reviews by competitors, need to be policed by the review host site. Indeed, gathering fake reviews has become big business. [2]

5. Portable water purification - Wikipedia

   en.wikipedia.org/wiki/Portable_water_purification

   The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.

6. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Permanent water chlorination began in 1905, when a faulty slow sand filter and a contaminated water supply led to a serious typhoid fever epidemic in Lincoln, England. [44] Alexander Cruickshank Houston used chlorination of the water to stem the epidemic. His installation fed a concentrated solution of chloride of lime to the water being treated.

7. Review - Wikipedia

   en.wikipedia.org/wiki/Review

   A user review refers to a review written by a user or consumer of a product or service based on the author's own experience as a user of the reviewed product. Popular sources for consumer reviews are e-commerce sites like Amazon.com and Zappos and social media sites like Tripadvisor and Yelp. E-commerce sites often have consumer reviews for ...