飞机限制问题

Automobilesproducelesspollutionthandoairplanes.Automobilesalsoconsumelessfossilfuel.Thereforeitisnecessarytorestrictsomeflights.Doyouagreeordisagreewiththisopinion?

Theargumentthattheflightsshouldberestrictedisinvalid.Clearly,itisunconvincingtocomparethevolumeofpollutantsanairplaneproduceswiththatgeneratedbyanautomobile,becauseanairplaneissharedbymanypassengerswhileanautomobileisusuallyforoneor,atthebest,severalpassengers.

Supposeavisitordrives1,000miles,burning100litergasolineandemitting10cubicmetercarbondioxide,thisverypassengeristotallyresponsibleforsuchanenvironmentproblem.Buttowhatextentshouldanotherpassenger,whotravelsthesamedistancebyair,takeenvironmentresponsibility?Iftheairplaneconsumes10,000litergasolineandproduces1000cubicmetercarbondioxideandifaltogether300passengerssharetheflight,thentravelingbyaircauseslessenvironmentaldamage.

Anotherthingmustalsobeinthelistofconsideration:thetime.Travelingbyairsavestime.Thepointisthateveniftravelingbyautomobilesconsumeslessenergyandproduceslesspollutants,travelingbyairhasavarietyofreasons.Forinstance,apatientistransportedbyairfromwheresheisinjuredtothehospital.

Theopponentsmightarguethatthisisnotthe“unnecessaryflights”.Neverthelessitisambiguousandvaguetousesuchaterm.Howtodefinean“unnecessary”flight?Istherealegalorgenerallyacceptedcriterionagainstwhichthefeatureofaflightcanbeclearlyandcorrectlylabeledas“necessary”or“unnecessary”?Nay.

Therefore,theargumentmentionedinthetopicisneitherlogicallysoundnorpracticallysignificant.

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