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  2. 1,1,1,2-Tetrafluoroethane - Wikipedia

    en.wikipedia.org/wiki/1,1,1,2-Tetrafluoroethane

    1,1,1,2-Tetrafluoroethane (also known as norflurane (), R-134a, Klea 134a, Freon 134a, Forane 134a, Genetron 134a, Green Gas, Florasol 134a, Suva 134a, HFA-134a, or HFC-134a) is a hydrofluorocarbon (HFC) and haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential and a lower 100-year global warming ...

  3. 2,3,3,3-Tetrafluoropropene - Wikipedia

    en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene

    HFO-1234yf has a GWP less than carbon dioxide, [4] [2] itself 1,430 times less potent than R-134a. [5] For this reason, 2,3,3,3‑tetrafluoropropene is the pre-eminent replacement for R-134a in vehicular air conditioners. As of 2022, 90% of new U.S. vehicles are estimated to use HFO-1234yf.

  4. Hydrofluorocarbon - Wikipedia

    en.wikipedia.org/wiki/Hydrofluorocarbon

    They are frequently used in air conditioning and as refrigerants; R-134a (1,1,1,2-tetrafluoroethane) is one of the most commonly used HFC refrigerants. In order to aid the recovery of the stratospheric ozone layer, HFCs were adopted to replace the more potent chlorofluorocarbons (CFCs), which were phased out from use by the Montreal Protocol ...

  5. Conditions have improved in some parts of Pennsylvania, but some people may still be especially vulnerable. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways ...

  6. Will northern lights return to Pennsylvania? - AOL

    www.aol.com/northern-lights-return-pennsylvania...

    In Pennsylvania, the best bet is to go a high place in the darker and more remote areas of your region. Luckily, much of the state is going to experience clear skies tonight. Western Pennsylvania ...

  7. Dichlorodifluoromethane - Wikipedia

    en.wikipedia.org/wiki/Dichlorodifluoromethane

    R-12 was used in most refrigeration and vehicle air conditioning applications prior to 1994 before being replaced by 1,1,1,2-tetrafluoroethane (R-134a), which has an insignificant ozone depletion potential. Automobile manufacturers began phasing in R-134a around 1993 [citation needed].

  8. Trash pickups change for the Christmas holiday. Here are ...

    www.aol.com/news/trash-pickups-change-christmas...

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  9. Shell Pennsylvania Petrochemicals Complex - Wikipedia

    en.wikipedia.org/wiki/Shell_Pennsylvania...

    Pennsylvania, Ohio and West Virginia engaged in a tax competition for the plant. In 2012, Pennsylvania structured a deal requiring Shell to invest at least $1 billion in Pennsylvania and create at least 2,500 construction jobs in exchange for a 25-year tax incentive of $66 million per year and tied to production, reducing Shell's tax by up to 20 per cent.