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2. 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.

3. Gravity filtration - Wikipedia

   en.wikipedia.org/wiki/Gravity_filtration

   Gravity filtration is a method of filtering impurities from solutions by using gravity to pull liquid through a filter. The two main kinds of filtration used in laboratories are gravity and vacuum/suction. Gravity filtration is often used in chemical laboratories to filter precipitates from precipitation reactions as well as drying agents ...

4. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

5. LifeStraw - Wikipedia

   en.wikipedia.org/wiki/LifeStraw

   LifeStraw is a brand of water filtration and purification devices. The original LifeStraw was designed as a portable water filter "straw". It filters a maximum of 4,000 litres of water, enough for one person for three years. It removes almost all waterborne bacteria, microplastics and parasites. [ 1] A bottle was later developed which ...

6. 5 top-rated and lab-tested air purifiers - AOL

   www.aol.com/news/5-top-rated-lab-tested...

   Honeywell HPA300 $ at Amazon. Honeywell HPA300 $ at Best Buy. Honeywell HPA300 $ at Walmart. This air purifier is fit for a larger space than most other options, but at a lower price.

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