What are the advantages and desadvantages of travelling by air?

advantages - faster
sometimes cheap
shows some pretty good movies

disadvantages - depends how long your flight is
uncomfortable
soemtimes expensive

Advantages are so many i.e.faster, comfortable, etc. But there are disadvantages as well i.e. it will affect global warmning. So try to avoid flying when you have other options than travelling by Air. I suppose we can contribute a lot if everyone who travels by Air find other option once a year to avoid it. It will make lots of difference as a mass.