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  2. Polyethylene terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polyethylene_terephthalate

    Plastic bottles made from PET are widely used for soft drinks, both still and sparkling. For beverages that are degraded by oxygen, such as beer, a multilayer structure is used. PET sandwiches an additional polyvinyl alcohol (PVOH) or polyamide (PA) layer to further reduce its oxygen permeability.

  3. Plasticulture - Wikipedia

    en.wikipedia.org/wiki/Plasticulture

    A greenhouse is a large structure in which it is possible to stand and work with automated ventilation. High tunnels are hoop houses, manually ventilated by rolling up the sides. Greenhouse and high tunnel films are usually within the parameters of 80-220μm thick and 20m wide, and have a life span between 6–45 months dependent on several ...

  4. Polytunnel - Wikipedia

    en.wikipedia.org/wiki/Polytunnel

    Polytunnels on Balhungie Farm, Angus A polytunnel (also known as a polyhouse, hoop greenhouse or hoophouse, grow tunnel or high tunnel) is a tunnel typically made from steel and covered in polyethylene, usually semi-circular, square or elongated in shape.

  5. An Underground Greenhouse Is the Secret to Year-Round ... - AOL

    www.aol.com/underground-greenhouse-secret-round...

    An underground greenhouse, often called a walipini, is a sunken outdoor structure designed to keep plants alive year-round by levering the insulation properties of the surrounding earth.

  6. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    Polycarbonate sheeting in a greenhouse. The second largest consumer of polycarbonates is the construction industry, e.g. for domelights, flat or curved glazing, roofing sheets and sound walls. Polycarbonates are used to create materials used in buildings that must be durable but light.

  7. Teacher Who Got Pregnant After Raping Boy, 12, Gets 25 Years ...

    www.aol.com/teacher-got-pregnant-raping-boy...

    A former Tennessee teacher who got pregnant after raping a 12-year-old boy pleaded guilty and has been sentenced to 25 years in prison with no parole. On Dec. 20, Alissa McCommon, 39, of Covington ...

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