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within the ancient forest. Resin in the process of hardening usually develops a skin whilst the interior is still
soft. Occasionally amber of this nature has impressions stamped on its surface and thus becomes a trace
fossil. For instance the clear impression of a cat’s paw has been found on a piece of amber found in the
Baltic area.
The faking of inclusions in amber has been a major cottage industry since the earliest times. Gum is
melted gently and suitable inclusions placed into the matrix; this is frequently some kind of colourful insect.
Artificial colour is always a dead give away of a bogus amber fossil.
Questions 1-3
Choose
THREE
letters
A-H
.
Which
THREE
of the following are NOT given as possible reasons for the production of the resin by tress
which later forms amber?
A.
A defence system.
B.
Changes in the molecular structure of the tree.
C.
A development side-effect.
D.
An effect of the Baltic weather.
E.
A way of dealing with water loss.
F.
The result of oxidization.
G.
Part of the reproduction process.
H.
A result of damage.
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TEST 8 – Unlikely Boomtowns: The World’s Hottest Cities
Megacities like London, New York and Tokyo loom large in our imaginations. They are still
associated with fortune, fame and the future. They can dominate national economies and politics. The last
fifty years has been their era, as the number of cities with more than ten million people grew from two to
twenty. But with all respect to the science fiction novelists who have envisioned a future of urban giants,
their day is over. The typical growth rate of the population within a megacity has slowed from more than
eight percent in the 1980s to less than half that over the last five years, and numbers are expected to be static
in the next quarter century. Instead, the coming years will belong to a smaller, more humbler relation - the
Second City.
Within a few years, more people will live in cities than in the countryside for the first time in human
history. But increasingly, the urban core itself is downsizing. Already, half the city dwellers in the world live
in metropolises with fewer than half-a-million residents. Second Cities from exurbs, residential areas outside
the suburbs of a town, to regional centres are booming. Between 2000 and 2015, the world’s smallest cities
(with under 500,000 people) will grow by 23 per cent, while the next smallest (One million to five million
people) will grow by 27 per cent. This trend is the result of dramatic shifts including the global real estate
bubble; increasing international migration; cheaper transport; new technologies, and the fact that the baby-
boom generation is reaching retirement age.
The emergence of Second Cities has flowed naturally (if unexpectedly) from the earlier success of the
megacities. In the 1990s, megacities boomed as global markets did. This was particularly true in areas with
high tech or 'knowledge based' industries like finance. Bonuses got bigger, bankers got richer and real estate
prices in the world’s most sought-alter cities soared. The result has been the creation of what demographer
William Frey of the Washington based Brookings Institute calls ‘gated regions’ in which both the city and
many of the surrounding suburbs have become unaffordable for all but the very wealthy. Economically, after
a city reaches a certain size its productivity starts to fall,’ notes Mario Pezzini, head of the regional
competitiveness division of the OECD. He puts the tipping point at about six million people, after which
costs, travel times and the occasional chaos create in which the centre of the city may be a great place, but
only for the rich, and the outlying areas become harder to live and work in.
One reaction to this phenomenon is further sprawl high prices in the urban core and traditional
suburbs drive people to distant exurbs with extreme commutes into big cities. As Frey notes, in the major
US metropolitan areas, average commuting times have doubled over the last fifteen years.
Why does one town become a booming Second City, while another fails? The answer hinges on
whether a community has the wherewithal to exploit the forces pushing people and businesses out of the
megacities. One key is excellent transport links, especially to the biggest commercial centres. Though barely
a decade old, Goyang is South Koreas fastest- growing city in part because it is 30 minutes by subway from
Seoul.
Another growth driver for Second Cities is the decentralisation of work, driven in large part by new
technologies. While more financial deals are done now in big capitals like New York and London than ever
before, it is also clear that plenty of booming service industries are leaving for ‘Rising Urban stars’ like
Dubai, Montpellier and Cape Town. These places have not only improved their Internet backbones but often
have technical institutes and universities that turn out the kinds of talent that populate growth industries.
Consider Montpellier, France, a case study in urban decentralisation. Until the 1980s, it was like a big
Mediterranean village. Once the high speed train lines were built, Parisians began pouring in for weekend
breaks. Some bought houses, creating a critical mass of middle-class professionals who began taking
advantage of flexible working systems to do three days in Paris, and two down South, where things seemed
less pressured. Soon big companies began looking at the area, a number of medical technology and
electronic firms came to town, and IBM put more investment into service businesses there. To cater to the
incoming professionals, the city began building amenities: an opera house, a tram line to discourage cars in
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