http://en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene From Wikipedia: has investigated whether English has investigated whether English From Wikipedia: English has investigated whether From Wikipedia: 2,3,3,3-Tetrafluoropropene English air conditioning refrigerant English HFO-1234yf http://en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene English From Wikipedia: From Wikipedia: has investigated whether has investigated whether English