Some world cities are also mega cities. These
are central cities that fuel the nation's;
economy, education sector, business district etc.
Paris
London
Tokyo
Cities can grow because they
are resource bases.
Companies need knowledge
to grow, world cities are
hubs for research and
universities.
In highly densely
packed areas, by
chance it is more
likely that
innovation and
new ideas will
flourish.
Rural - Urban
migration due to the:
decline of
manufacturing since
the industrial
revolution, the
increase in job
opportunities and a
better living wage in
the city.