The service by Ryanair is different: there is nothing free and a lot of advertising on the flight. There is even lottery! Sometimes it's very uncomfortable to travel with Ryanair or other low cost airlines because airports are secondary: it takes time and money to go in the city center. For one week-end it looks like very interesting to fly but it costs more energy and money for the passenger than he can imagine before booking. When I was 19 I had flight 6 times with Ryanair to go to London, sometimes only for one night with friends, but even if it costed 10 (bank fees? flights themselves were free), the shuttle buses were expensive and we arrived very late on Picadilly Circus. To conclude this part about low cost airlines, I would say, in contradiction with the class, that low-cost airlines are a good opportunity for long-haul flights (when there is one!), but for short week-ends in Europe I would no more use low-cost airlines because of the limited time I have.
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[...] Then they could promise to the population that impacts would be reduced to a large degree. Another problem when people are flying is the promiscuity: diseases can be transmitted very quickly. And one of the major problems is the pollution due to the airline industry, which could be reduced thanks to government, airlines or manufacturers. I put this last problem in perspective, because the first polluting mean of transportation is the road transport. Many people think that the air traffic is the biggest pollution's because we have, but it's not. [...]
[...] The airline industry The presentation we had last Thursday was interesting to me. I will try to summarize it and add some information's or give my opinion. The air transport includes passengers' traffic and freight. There are mostly big companies, national or international. The 3 biggest companies are Delta, United continental (both are American companies) and AirFrance KLM European company). Since the 1st World War the routes in Europe between major cities are opened. The traffic is developed now, and not only between biggest cities. [...]