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STATE OF THE WORLD'S CITIES 2012/2013 Prosperity

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stakeholders, particularly at local level, if sustainable<br />

development is to be achieved. 8<br />

Nowhere are the commitments of cities to<br />

environmental sustainability more vital than in developing<br />

countries, where urban demographics are growing rapidly<br />

and current total population accounts for 82 per cent<br />

of the world population. This underscores the need for<br />

growth and prosperity to sustain and fulfil basic needs.<br />

Vitally important as economic growth may be, it must be<br />

sustainable if any city is to achieve prosperity.<br />

AFRICAN <strong>CITIES</strong><br />

In Nairobi, for example, local experts point to extensive<br />

pollution of the Nairobi River not just by industrial effluents<br />

but also solid waste. 12 Traffic congestion is also mentioned<br />

as a major environmental problem, and apart from the<br />

attendant air pollution, the cost to the local economy<br />

is enormous. 13 Similar opinions are held by experts in<br />

Lusaka, Accra, Algiers, Lagos, Ibadan and Luanda, where<br />

rapid urban sprawl and uncontrolled spatial development<br />

combine with poor infrastructures and weak regulatory<br />

Figure 2.5.1<br />

Environmental Impact of Growth* – African Cities<br />

per cent<br />

100<br />

90<br />

80<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

0<br />

Nairobi<br />

Lusaka<br />

Praia<br />

Algiers<br />

Dar Es Salaam<br />

Ibadan<br />

Accra<br />

Luanda<br />

* As perceived by local experts surveyed by UN-Habitat<br />

Source: UN-Habitat, City Monitoring Branch, Policy Survey, 2011<br />

Lagos<br />

Addis Ababa<br />

Gaborone<br />

79<br />

Environmental Sustainability and the <strong>Prosperity</strong> of Cities<br />

FACT<br />

In Europe, cities stand at the forefront of initiatives<br />

in favour of environmental sustainability9 , as they<br />

keep developing and implementing various policies and<br />

strategies. 10<br />

POLICy<br />

If economic development and related urban activities<br />

are pursued in an environmentally sustainable<br />

manner, they can facilitate urban prosperity.<br />

frameworks to undermine quality of life and, more<br />

generally, prosperity in their respective cities.<br />

Of the fourteen African cities covered in this Report,<br />

no more than four – Johannesburg, Beira, Alexandria, and<br />

Gaborone – can be found where only a few local experts<br />

perceive that economic development and related activities<br />

have negative effects on<br />

the environment. This<br />

comes as no surprise<br />

Africa’s rate<br />

FACT of economic<br />

growth has outpaced<br />

the global economic<br />

growth over the last<br />

decade. Real growth<br />

GDP has been steady<br />

particularly in the<br />

Sub-Saharan region,<br />

a sub-region expected<br />

to continue growing by<br />

more than 5 per cent. 11<br />

Alexandria<br />

Johannesburg<br />

Beira<br />

All Sampled<br />

Africa Cities<br />

POLICy<br />

However, an<br />

overwhelming<br />

majority of local experts<br />

believe that urban<br />

economic development has<br />

unintended effects on the<br />

environment in cities such<br />

as Nairobi, Lusaka, Praia,<br />

Algiers, Dar es Salaam,<br />

Ibadan, Accra, Luanda and<br />

Lagos. These cities are<br />

seen to be unable to match<br />

sustained economic and<br />

demographic growth with<br />

corresponding expansion in<br />

infrastructures and services.

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