should i study hong kong and calcutta or just one for the high population density question
Just one of the two. They are both examples of high population density.
calcutta is far easier! just the one :)
it depends on what your teacher chooses. i say that you should study Calcutta
Kolkata is the best one :) learn off 2 problems e.g overcrowding and shortage of clean water also know about squatters and stuf