Natural Hazards: Causes and Effects - Disaster Management Center ...

Natural Hazards: Causes and Effects - Disaster Management Center ... Natural Hazards: Causes and Effects - Disaster Management Center ...

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present state and would be better off as forest. Therefore, it is necessary to gather information on overall forest trends. In much of the world this data on forest trends has generally been unreliable or altogether lacking. But recently a large number of surveys have been initiated, many of them making use of satellite photography, and the quality of forest data is improving fast. Discussions of forest trends are plagued by definitional problems. How many trees, how close together, make a forest? At what point does selective logging become deforestation? If the clearing of a slash-and-burn farmer will be left for natural regrowth, has deforestation occurred? Even statistics on tree planting can be confusing. A eucalyptus plantation established on former cropland should not be lumped together with a restored hillside forest of mixed native species. And “reforestation” often means clearing standing forests to make room for tree plantations. Impact on Built and Natural Environments Impact on Buildings Deforestation and timber scarcity have an especially harmful impact on housing in poor countries. Even if Third World governments were to make a serious effort to meet the housing problem, adequate wood supplies would not be available in many cases. For example, in the late 1970s the Indian state of Gujarat conceived of an ambitious plan to construct huts for landless laborers. The plan was derailed by the lack of raw materials. The program called for 25 million wood poles, but only 400,000 of these became available each year; and only four million bamboo stalks were produced a year although 765 million were needed. Impact on Agriculture and Ecology Deforestation’s impact on food supply follows this chain of events: 1. deforestation 2. erosion 3. collapse of hillsides 4. loss of topsoil and agricultural land. Deforestation also unbalances the water supply by contributing to drought and flood. Impact on Economy What are the economic consequences of uncontrolled deforestation and forest-product scarcity? One outcome of a nation’s forestry shortcomings can be a rising dependence on imported forest products. Already most Third World countries are net importers of forest products, particularly paper (the production of which requires both wood-fiber and manufacturing plants). Trade-deficit figures do not come close to capturing the negative impacts of tree scarcity, some of which are acutely felt by low-income citizens even in timber-exporting countries. For one thing the major forest products used by most Third World residents never enter the market economy; when fruits or firewood become scarce, people either do without or switch to noncommercial alternatives rather than to imported goods. In addition, foreign exchange shortages and high prices can hold a nation’s wood and paper consumption well below the levels at which basic needs are satisfied. Acute scarcities of firewood and timber plague wide areas of Africa, Asia, and Latin America. But a continuation of the last quarter-century’s trends of deforestation, inadequate forest renewal, and growth in wood demand would have worldwide repercussions. The amount of

exploitable timber available per person in the world is falling; in the words of the U.S. government’s Global 2000 study, we face a “transition from a period of global forest wealth to a period of global forest poverty.” 8 Real prices of commercial wood products are certain to rise, choking off projected consumption increases, fueling inflation, and denying low-income people everywhere many of the benefits that forest products provide. Soaring firewood prices are also another inflation source. Almost everywhere that commercial firewood markets exist, prices over the last decade have multiplied . In one town in Upper Volta, a donkey cartload of wood that sold for 350 Central African francs in 1970 cost 1000 francs in 1975 and 1750 francs in 1979. In parts of West Africa and Central America urban families spend one-fourth of their income on wood or charcoal for cooking. As market prices have outpaced the purchasing power of the urban poor, many state governments in India have had to establish special firewood depots that sell low-priced fuel to the poorest groups. Subsidized firewood has joined subsidized food as a measure necessary to prevent starvation in India. Recovery Strategies and Problems Forestry planning must incorporate both a long-term horizon and a humane social vision. One of the most positive developments in the global environmental scene over the last decade has been the new recognition of the importance of forestry among aid agencies and Third World governments. But the sources of deforestation are deep. The Role of Foresters Meeting the forestry challenge requires radical changes in the roles of foresters and national forest agencies. Their traditional mandates have been to protect and manage the exploitation of forest reserves. Good foresters have always been concerned as well with protecting environmentally crucial forest areas and sustaining the long-term output of the forests in their care. But even these desirable traits are not enough. Today foresters need to move outside the forests and help people meet their basic forest needs. As an alternative to large plantations, integrating trees and wood production into small-farm systems holds great potential in both semiarid and humid areas. Spatially-dispersed forestry practiced by many farmers can often provide far greater environmental benefits than a woodlot concentrated in one place. Impact on Communities To an outsider, prompting rural communities to grow some badly needed trees may not seem like such a tall order. But the experience of countries such as China and South Korea, which have already implemented participatory forestry on a wide scale, demonstrates that actually doing so requires changes in the attitudes and activities of governments and aid agencies, and reforms in villagers’ social organization and land use. Foresters, and development planners in general, are used to running things from above. What contact they have had with villagers has usually been in their roles as policemen, denying destitute people access to protected lands and wood. Yet experience has shown that tree planting cannot be imposed from above and carried out in the face of a hostile population. New forms of land use impinge upon the daily activities of everyone. When the local people are not active supporters, saplings have a way of disappearing overnight. With fodder usually as scarce as firewood, uncontrolled goats or cattle

exploitable timber available per person in the world is falling; in the words of the U.S.<br />

government’s Global 2000 study, we face a “transition from a period of global forest wealth to a<br />

period of global forest poverty.” 8 Real prices of commercial wood products are certain to rise,<br />

choking off projected consumption increases, fueling inflation, <strong>and</strong> denying low-income people<br />

everywhere many of the benefits that forest products provide.<br />

Soaring firewood prices are also another inflation source. Almost everywhere that commercial<br />

firewood markets exist, prices over the last decade have multiplied . In one town in Upper<br />

Volta, a donkey cartload of wood that sold for 350 Central African francs in 1970 cost 1000<br />

francs in 1975 <strong>and</strong> 1750 francs in 1979. In parts of West Africa <strong>and</strong> Central America urban<br />

families spend one-fourth of their income on wood or charcoal for cooking. As market prices<br />

have outpaced the purchasing power of the urban poor, many state governments in India have<br />

had to establish special firewood depots that sell low-priced fuel to the poorest groups.<br />

Subsidized firewood has joined subsidized food as a measure necessary to prevent starvation<br />

in India.<br />

Recovery Strategies <strong>and</strong> Problems<br />

Forestry planning must incorporate both a long-term horizon <strong>and</strong> a humane social vision. One<br />

of the most positive developments in the global environmental scene over the last decade has<br />

been the new recognition of the importance of forestry among aid agencies <strong>and</strong> Third World<br />

governments. But the sources of deforestation are deep.<br />

The Role of Foresters<br />

Meeting the forestry challenge requires radical changes in the roles of foresters <strong>and</strong> national<br />

forest agencies. Their traditional m<strong>and</strong>ates have been to protect <strong>and</strong> manage the exploitation of<br />

forest reserves. Good foresters have always been concerned as well with protecting<br />

environmentally crucial forest areas <strong>and</strong> sustaining the long-term output of the forests in their<br />

care. But even these desirable traits are not enough. Today foresters need to move outside the<br />

forests <strong>and</strong> help people meet their basic forest needs.<br />

As an alternative to large plantations, integrating trees <strong>and</strong> wood production into small-farm<br />

systems holds great potential in both semiarid <strong>and</strong> humid areas. Spatially-dispersed forestry<br />

practiced by many farmers can often provide far greater environmental benefits than a woodlot<br />

concentrated in one place.<br />

Impact on Communities<br />

To an outsider, prompting rural communities to grow some badly needed trees may not seem<br />

like such a tall order. But the experience of countries such as China <strong>and</strong> South Korea, which<br />

have already implemented participatory forestry on a wide scale, demonstrates that actually<br />

doing so requires changes in the attitudes <strong>and</strong> activities of governments <strong>and</strong> aid agencies, <strong>and</strong><br />

reforms in villagers’ social organization <strong>and</strong> l<strong>and</strong> use.<br />

Foresters, <strong>and</strong> development planners in general, are used to running things from above. What<br />

contact they have had with villagers has usually been in their roles as policemen, denying<br />

destitute people access to protected l<strong>and</strong>s <strong>and</strong> wood.<br />

Yet experience has shown that tree planting cannot be imposed from above <strong>and</strong> carried out in<br />

the face of a hostile population. New forms of l<strong>and</strong> use impinge upon the daily activities of<br />

everyone. When the local people are not active supporters, saplings have a way of<br />

disappearing overnight. With fodder usually as scarce as firewood, uncontrolled goats or cattle

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