SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 6-K


                        Report of Foreign Private Issuer


                       Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934


                     For the month of January, 2007

                              RYANAIR HOLDINGS PLC
                (Translation of registrant's name into English)

                     c/o Ryanair Ltd Corporate Head Office
                                 Dublin Airport
                             County Dublin Ireland
                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

                         Form 20-F..X.. Form 40-F.....


Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange
Act of 1934.

                               Yes ..... No ..X..


If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ________





                 RYANAIR IS EUROPE'S GREENEST, CLEANEST AIRLINE

                BUY ONE FLIGHT AND GET A SECOND ABSOLUTELY FREE*

Ryanair, Europe's largest low fares airline today (Wednesday, 10th January 2007)
celebrated  being Europe's  Greenest  Cleanest  Airline by giving away a million
free* seats  (taxes  reduced to zero) - one with each flight  booked  before the
18th January 2007.

The  Stern  Report  confirmed  that  aviation  accounts  for just 1.6% of global
greenhouse gas emissions.  Over the past 5 years,  Ryanair has invested over $10
billion  in brand new  aircraft,  which has  delivered  a 50%  reduction  in CO2
emissions  and a 45%  reduction  in fuel  burn and  noise.  The  Dutch  Consumer
Organisation has recently confirmed that Ryanair is Europe's greenest,  cleanest
airline.

Gordon  Brown's  decision  to  double  APD from GBP5 to GBP10  per  ticket  will
generate  over GBP1  billion in tax revenue for the  Government.  At GBP10 on an
average  GBP28 ticket,  Ryanair  passengers  are being taxed at over 35%.  These
taxes are regressive and ineffective. Gordon Brown won't spend any of this money
on the  environment.  He is just using the  environment to steal more taxes from
ordinary passengers.

Speaking today Ryanair's CEO, Michael O'Leary, said:

        "The Stern Report has confirmed that aviation accounts for just 1.6% of
        global green house gas emissions. The Dutch Consumer Organisation has
        recognised that passengers flying with Ryanair are choosing Europe's
        cleanest and greenest airline.

        "Over the past 5 years, Ryanair has achieved a 50% reduction in CO2
        emissions and a 45% reduction in fuel burn and noise by investing over
        $10 billion in brand new aircraft. Ryanair now operates the youngest,
        quietest, most fuel efficient fleet in the industry.

        "To celebrate being Europe's lowest fare and greenest airline, Ryanair
        is giving away a free* flight (taxes reduced to zero) with all bookings
        made before the 18th January. This special offer lasts one week only and
        demand will be very strong so we urge passengers to book immediately on
        www.ryanair.com.

        "Since aviation accounts for just 1.6% of global emissions it is neither
        the cause of nor the solution to global warming. Passengers flying with
        Ryanair are already doing their bit by choosing Europe's greenest and
        cleanest airline".


* Offer  starts  11th  January  2007,  2nd free flight for travel  between  16th
January  2007  and  8th  February  2007.   Terms  and  conditions  apply  -  see
www.ryanair.com for details

Ends. Wednesday, 10th January 2007

Peter Sherrard - Ryanair Pauline McAlester - Murray Consultants

Tel: 00 353 1 812 1228 Tel; 00 353 1 4980 300





                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, hereunto duly authorized.

                                    RYANAIR HOLDINGS PLC


Date:  10 January, 2007

                                    By:___/s/ James Callaghan____

                                    James Callaghan
                                    Company Secretary & Finance Director