Complete the sentences using the correct form (where necessary) of the given words in brackets (building, population, traffic, pollution, noisy, crowded.).
in the city where I
I want to move to the country because it is 1)
and 2)
live.
I
There are a lot of tall 3)
in New York.
Our city has a 4)
of over 2 million people.
Now big cities have problems with 5)
and 6)
