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Belfast - a sustainable city?
Sustainability has been defined as meeting the needs of the present generation without damaging the chances of meeting the needs of future generations' (paraphrased from the Bruntland Report, 1987). A sustainable settlement must meet the needs of its inhabitants without using so many resources or causing damage to the environment in such a way as to make things difficult for later generations. Is Belfast sustainable?
At its simplest, sustainability is about resources. Belfast uses an enormous range of these each year. Fred Boal, from Queen's University Geography Department (in Shaping a City. Belfast in the late Twentieth Century), adapted figures for Belfast which are summarized in the table below.
|
What
Belfast takes in each year
|
Tonnes
|
| Water |
50,100,000
|
|
Oxygen
|
2,000,000
|
| Fuel |
2,000,000
|
| Food |
795,000
|
| Timber |
60,000
|
| Tropical Timber |
10,000
|
| Paper |
110,000
|
| Plastics |
105,000
|
| Cement |
97,000
|
| Bricks, blocks, sand and tarmac |
300,000
|
|
What
Belfast gives out each year
|
Tonnes
|
| Household waste |
121,000
|
| Sewage sludge |
375,000
|
| Commercial and Industrial wastes |
150,000
|
| Carbon Dioxide |
3,000,000
|
| Sulphur Dioxide |
20,000
|
| Nitrous Oxides |
14,000
|
As the table shows, much of the resources that the inhabitants of Belfast use come from outside the city. The use of 10,000 tonnes of tropical timber shows that it even effects tropical rainforests. Like any settlement, Belfast has an impact, called an ecological footprint, on the world.
The
domestic refuse produced by the population of Belfast is one example of how
the city has an impact on the environment. Much of what is brought into Belfast
eventually ends up in landfill sites like the one illustrated here in Dargan
Road in a photograph by John Doherty. As these landfill sites within the city
become filled, and the landfill on Dargan Road is virtually full, the city has
to 'export' its waste out into landfill areas in the surrounding countryside.
This increases the area on which the city has an impact. As landfill sites become
more scarce, and also more expensive, the dilemma of what to do with Belfast's
household waste is made more and more difficult.
Geraint Ellis (2000), from whom the table below is adapted, shows that the people of Belfast need an area nearly 50 times bigger than the city to keep them in existence. This is nearly the total area of Northern Ireland. In other words, each person who lives in Belfast needs an average 2.8 hectares each year to supply his or her needs (a hectare is 100metresx100metres). While this is not as bad as an average North American, who needs about 4.5 hectares, it is much worse than an average inhabitant of a LEDC (Less Economically Developed Country) such as Bangladesh where less than half a hectare is needed for each person. Is Belfast sustainable ... and if it is not, what can we do to make it:
| Area of Belfast (hectares) |
27,225
ha
|
| Population of Belfast Urban area (1991) |
475,967
|
| Farmland used to grow food: 1.2 hectares per person per year |
577,863
ha
|
| Forest area required to grow enough wood = 0.1 hectare per person per year |
52,000
ha
|
| Area needed to absorb carbon dioxide = 1.5 hectares per person |
712,698
ha
|
| Belfast Ecological Footprint |
1,342,561
ha
|
| Total area of Northern Ireland |
1,415,324
ha
|
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