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  2. Hardiness (plants) - Wikipedia

    en.wikipedia.org/wiki/Hardiness_(plants)

    H1a, higher than 15 °C (59 °F), applies to tropical plants permanently under glass in heat; while H7, below −20 °C (−4 °F), applies to very cold-tolerant plants such as heathers. Most outdoor plants in the UK fall within the range H4, −10 to −5 °C (14 to 23 °F) (hardy in the average winter) to H5, −15 to −10 °C (5 to 14 °F ...

  3. Raw water - Wikipedia

    en.wikipedia.org/wiki/Raw_water

    Raw water is generally unsafe for human consumption due to the presence of contaminants. A major health problem in some developing countries is use of raw water for drinking and cooking. [1] Without treatment, raw water can be used for irrigation, construction, or cleaning purposes. [2]

  4. List of hardy palms - Wikipedia

    en.wikipedia.org/wiki/List_of_hardy_palms

    Hardy palms are any of the species of palm that are able to withstand brief periods of colder temperatures and even occasional snowfall.A few palms are native to higher elevations of South Asia where true winter conditions occur, while a few others are native to the warmer parts of the temperate zone in southern Europe, and others are native throughout temperate and subtropical locales in the ...

  5. Waste stabilization pond - Wikipedia

    en.wikipedia.org/wiki/Waste_stabilization_pond

    The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or reclaimed water) if the effluent meets the required effluent standards (e.g. sufficiently low levels of pathogens).

  6. Climate of Columbus, Ohio - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Columbus,_Ohio

    Columbus, Ohio has a humid continental (Köppen climate classification Dfa) climate, characterized by humid, hot summers and cold winters, with no dry season.The Dfa climate has average temperatures above 22 °C (72 °F) during the warmest months, with at least four months averaging above 10 °C (50 °F), and below 0 °C (32 °F) during the coldest.

  7. Industrial wastewater treatment - Wikipedia

    en.wikipedia.org/.../Industrial_wastewater_treatment

    Brine treatment systems are typically optimized to either reduce the volume of the final discharge for more economic disposal (as disposal costs are often based on volume) or maximize the recovery of fresh water or salts. Brine treatment systems may also be optimized to reduce electricity consumption, chemical usage, or physical footprint.

  8. Viola odorata - Wikipedia

    en.wikipedia.org/wiki/Viola_odorata

    Viola odorata is a species of flowering plant in the family Violaceae native to Eurasia. The small hardy herbaceous perennial is commonly known as wood violet , [ 2 ] sweet violet , [ 3 ] English violet , [ 3 ] common violet , [ 3 ] florist's violet , [ 3 ] or garden violet .

  9. List of wastewater treatment technologies - Wikipedia

    en.wikipedia.org/wiki/List_of_wastewater...

    Oil–water separator; Organisms used in water purification; Parallel plate oil–water separator; Photobioreactor; Reed bed; Regenerative thermal oxidizer; Retention basin; Reverse osmosis; Rotating biological contactor; Sand filter; Screen filter; Sedimentation (water treatment) Septic tank; Septic tank conversion [2] Sequencing batch reactor ...

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