Here is another point of view on urban sprawl. -SJ Otto
From The
Guardian:
The total area covered by the world’s cities is
set to triple in the next 40 years – eating up farmland and threatening the
planet’s sustainability. Ahead of the latest Urban
Age conference, Mark Swilling says it is
time to stop the sprawl
I
have just spent two days in Barcelona, one of the most densely
populated urban settlements in the world. There are 103
road intersections per sq km – high compared to Brasilia’s 41
or Shanghai’s Pudong area, which has only 17. Yet despite these high densities,
residents of Barcelona will tell you how profoundly liveable their city is.
Visitors are charmed by the pedestrianised
streets that thread their way through a maze of buildings constructed over the
centuries – between four and seven storeys high, on narrow streets leading to
piazzas where people sit at cafe tables or under shady trees. Many residents
walk or cycle to work, and public transport functions very well.
For the first time in human history, most of us live in urban settlements –
from megacities of 10-20 million, of which there were 28 in 2014, to
medium-sized cities of 1-5 million (417 in 2014), and smaller settlements (525 of between 500,000 and one million people in 2014).
Looking ahead, the biggest growth will occur not in megacities but these small-
and medium-sized cities.
Metropolises expand and contract. It is
estimated that 40% of Europe’s cities are shrinking (though
this is a trend that migration might help to reverse). Even in Africa, there
are some countries where the percentage of the total population living in
cities has declined at various times over the past two decades.
Overall, however, our current urban
population of around 3.9 billion is expected to grow to around 6.34 billion by
2050, out of a total global population of at least 9.5 billion. If we continue to design
and build as if the planet can provide unlimited resources, then this
near-doubling of the urban population will mean a doubling of the natural
resources required to build and operate our cities – which is not sustainable.
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