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2. Portable toilet - Wikipedia

   en.wikipedia.org/wiki/Portable_toilet

   A portable or mobile toilet (colloquial terms: thunderbox, porta-john, porta-potty or portaloo) is any type of toilet that can be moved around, some by one person, some by mechanical equipment such as a truck and crane. Most types do not require any pre-existing services or infrastructure, such as sewerage, and are completely self-contained.

3. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate. An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For ...

4. Evaporative cooler - Wikipedia

   en.wikipedia.org/wiki/Evaporative_cooler

   Porous pottery and coarse cloth maximize the area for evaporation. An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression ...

5. 4 DIY Air Conditioners That Actually Work - AOL

   www.aol.com/4-diy-air-conditioners-actually...

   This air conditioner is extra sturdy since it's made from a plastic cooler, and the fan can be powered by a 12 volt battery or a 15-watt (1 amp) solar panel. This makes it effective as a portable ...

6. Deep water source cooling - Wikipedia

   en.wikipedia.org/wiki/Deep_water_source_cooling

   Deep water source cooling (DWSC) or deep water air cooling is a form of air cooling for process and comfort space cooling which uses a large body of naturally cold water as a heat sink. It uses water at 4 to 10 degrees Celsius drawn from deep areas within lakes, oceans, aquifers or rivers, which is pumped through the one side of a heat exchanger .

7. A Camper Was Playing With Google Maps—and Stumbled Upon a ...

   www.aol.com/camper-playing-google-maps-stumbled...

   A man planning a camping trip using Google Maps ran across a uniquely curved spherical pit in Quebec. It may be an ancient asteroid impact crater. A Camper Was Playing With Google Maps—and ...