i dont believe in chem trails but why so many planes fly over the cities

[swiss]

Originally Posted by raaaid

is not this the reason for airports to be far from cities, maybe 30 km?

Airports were built outside cities for several reasons:
- they require a huge amount of land, hard to find in cities(and expensive)
- pollution and noise

Now, several decades later the airports are im the middle because the cities grew towards and around them.
The same is true for train stations btw.