Day 14
You should spend about 20 minutes on Questions 14-26, which are based on Reading
Passage 2 below.
Deforestation in the 21st century
When it comes to cutting down trees, satellite data reveals a shift from the patterns o f the
past
A
Globally, roughly 13 million hectares of forest are destroyed each year. Such
deforestation has long been driven by farmers desperate to earn a living or by
loggers building new roads into pristine forest. But now new data appears to show
that big, block clearings that reflect industrial deforestation have come to dominate,
rather than these smaller-scale efforts that
leave behind long, narrow swaths of
cleared land. Geographer Ruth DeFries of Columbia University and her colleagues
used satellite images to analyse tree-clearing in countries ringing the tropics,
representing 98 per cent of all remaining tropical forest. Instead of the usual ‘fish
bone’ signature of deforestation from small-scale operations, large, chunky blocks of
cleared land reveal a new motive for cutting down woods.
В
In fact, a statistical analysis of 41 countries showed that forest loss rates were most
closely linked with urban population growth and agricultural exports in the early part
of the 21st century - even overall population growth was not as strong an influence.
‘In
previous decades, deforestation was associated with planned colonisation,
resettlement schemes in local areas and farmers clearing land to grow food for
subsistence,’ DeFries says. ‘What we’re seeing now is a shift from small-scale
farmers driving deforestation to distant demands from urban growth, agricultural trade
and exports being more important drivers.
С
In other words, the increasing urbanisation of the developing world, as populations
leave rural areas to concentrate
in booming cities, is driving deforestation, rather than
containing it. Coupled with this there is an ongoing increase in consumption in the
developed world of products that have an impact on forests, whether furniture, shoe
leather or chicken feed. ‘One of the really striking characteristics of this century is
urbanisation and rapid urban growth in the developing world,’DeFries says. ‘People
in cities need to eat.’ ‘There’s no surprise there,’ observes
Scott Poynton, executive
director of the Tropical Forest Trust, a Switzerland-based organisation that helps
businesses implement and manage sustainable forestry in countries such as Brazil,
Congo and Indonesia. ‘It’s not about people chopping down trees. It’s all the people
in New York, Europe and elsewhere who want cheap products, primarily food.’
Reading Passage 2
D
De Eries argues that in order to help sustain this increasing urban and global
demand, agricultural productivity will need to be increased on lands that have already
been cleared. This means that better crop varieties or better management techniques
will need to be used on the many degraded and abandoned lands in the tropics. And
the Tropical Forest Trust is building management systems to
keep illegally harvested
wood from ending up in, for example, deck chairs, as well as expanding its efforts to
look at how to reduce the ‘forest footprint of agricultural products such as palm oil.
Poynton says, The point is to give forests value as forests, to keep them as forests
and give them a use as forests. They’re not going to be locked away as national
parks. That’s not going to happen.’
E
But it is not all bad news. Halts in tropical deforestation have resulted in forest
regrowth in some areas where tropical lands were previously cleared. And forest
clearing
in the Amazon, the world’s largest tropical forest, dropped from roughly
1.9 million hectares a year in the 1990s to 1.6 million hectares a year over the last
decade, according to the Brazilian government. ‘We know that deforestation has
slowed down in at least the Brazilian Amazon,’ DeFries says. ‘Every place is different.
Every country has its own particular situation, circumstances and driving forces.
F
Regardless of this, deforestation continues, and cutting down forests is one of the
largest sources of greenhouse gas emissions from human activity - a double blow
that both eliminates a biological
system to suck up CO, and creates a new source of
greenhouse gases in the form of decaying plants. The United Nations Environment
Programme estimates that slowing such deforestation could reduce some 50 billion
metric tons of CO,, or more than a year of global emissions. Indeed, international
climate negotiations continue to attempt to set up a system to encourage this, known
as the UN Development Programme’s fund for reducing emissions from deforestation
and forest degradation in developing countries (REDD). If policies like REDD) are to
be effective, we need to understand what the driving forces are
behind deforestation,
DeFries argues. This is particularly important in the light of new pressures that are on
the horizon: the need to reduce our dependence on fossil fuels and find alternative
power sources, particularly for private cars, is forcing governments to make products
such as biofuels more readily accessible. This will only exacerbate the pressures on
tropical forests.
G
But millions of hectares of pristine forest remain to protect, according to this new
analysis from Columbia University. Approximately 60 percent of the remaining
tropical forests are in countries or areas that currently have little agricultural trade or
urban growth. The amount of forest area in places like central Africa, Guyana and
Suriname,
DeFries notes, is huge. ‘There’s a lot of forest that has not yet faced these
pressures.’
Which paragraph contains the following information?
Write the correct letter, A-G, in boxes 14-19 on your answer sheet.
NB You may use any letter more than once.
14
two ways that farming activity might be improved in the future
15
reference to a fall in the rate of deforestation in one area
16
the amount of forest cut down annually
17
how future transport requirements may increase deforestation levels
18
a reference to the typical shape of early deforested areas
19
key reasons why forests in some areas have not been cut down
Questions 20-21
Choose TWO letters, A-E.
Which
TWO
of these reasons do experts give for current patterns of deforestation?
Write the correct letters in boxes 20 and 21 on your answer sheet.
A
to provide jobs
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