Uma pesquisa feita pelo Banco Mundial revelou que mais de 10% da população do Vietnã podem ser desalojados e 10% das cidades do país ficarem inundados até o fim deste século.
De acordo com o Banco Mundial, basta o nível do mar subir um metro para mais de 7% das terras agrícolas do Vietnã e quase 30% das suas zonas úmidas ficarem inundados. Alguns especialistas acreditam que o nível do mar se elevará vários metros até o ano 2100.
O Banco Mundial acredita que o aumento de um metro no nível do mar atingiria cerca de 0,3% do território de 84 países em desenvolvimento -- ou cerca de 194 mil km². Isto afetaria cerca de 56 milhões de pessoas. As nações ricas serão convocadas para ajudar as populações vulneráveis.
David
Adam,
The Guardian, Wednesday 10 December 2008This article was first published on
guardian.co.uk at 00.01 GMT on Wednesday 10 December 2008. It appeared in
the Guardian on
Wednesday 10 December 2008 on p9 of the
Society news & features section. It was last updated at 00.13 GMT on
Wednesday 10 December 2008.
Which country will be most affected by the steady rise of the seas? Which
country could see more than a tenth of its population displaced, a tenth of its
economic power crippled and a tenth of its towns and cities swamped by the end
of this century? The answer, which may surprise you, is
Vietnam, named by the World Bank as the nation with most to lose as global
warming forces the oceans to reclaim the land.
Just a one-metre rise in sea level would flood more than 7% of the country's agricultural land, and wreck nearly 30% of its wetlands, the bank says. And the situation could be worse than that: a one-metre rise in sea level is at the conservative end of the predictions for the year 2100. Some climate experts, including Jim Hansen, director of Nasa's Goddard Institute for Space Studies, argue that the likely rise should be measured in several metres.
A one-metre rise would still be enough to cause chaos. In a study recently published in the journal Climatic Change, the World Bank says such a rise would impact on about 0.3% of the territory - some 194,000 sq km - of 84 developing countries. That might not sound much, but it would affect about 56 million people. Coastal populations across poorer countries generally do better economically, so the surge in the seas would impact on GDP even more - about 1.3%.
The study, which summarises the findings of a 50-page briefing paper published by the bank last year, comes as campaigners call for rich countries such as the UK to do more to help the developing world adapt to the inevitable effects of climate change.
Heather Coleman, senior climate change policy adviser with Oxfam, says: "Helping vulnerable people cope with the effects of climate change is desperately needed today because they already face increasingly severe and ever-worsening climate change impacts."
The charity released a report last week that called for at least $50bn (£33.85bn) a year to be channelled from international carbon trading schemes into adaptation efforts.
"With a global financial crisis unfolding, these mechanisms could raise enough money from polluters without governments having to dip into national treasuries," Coleman says. "Many negotiators agree that this is one of the more practical approaches. Billions of dollars can be raised and invested to prevent future climate change and to help poor people adapt to the negative impacts of global warming."
Bio-shields
Oxfam says poor countries need help to upgrade national flood early-warning systems, plant mangrove "bio-shields" along coasts to diffuse storm waves, and grow drought-tolerant crops.
The report comes as ministers are due to arrive at UN talks in Poznan, Poland, to continue negotiations on a new global climate treaty to replace the Kyoto protocol. With little progress on new carbon targets expected until the new US administration makes its position clear next year, adaptation could be a key issue at Poznan.
"It is extremely important for negotiators in Poznan to reach a broad understanding about how best to raise adaptation money, because they have paid lip service to the issue for too long," Coleman says. "It is a vital part of the overall deal, a litmus test of how serious rich countries are in tackling the problem.
"Poor people around the world bear the brunt of climate change, and yet they are least responsible for global warming. Even during tempestuous financial times, rich countries can and should help poor people to cope. We can't afford to exchange a short-term saving for a long-term disaster."
If countries fail to adapt to the new reality of climate change, Coleman warns, they would suffer far greater damage from floods, droughts and hurricanes.
Of those, the World Bank study, led by Susmita Dasgupta, of its Development Research Group, says some countries will suffer the effects of sea level rise much worse than others. Severe impactswill be limited to a "relatively small number of countries".
As well as Vietnam, the report highlights likely damage to the Bahamas, which could lose more than a tenth of its territory to a one-metre rise, and Egypt, which faces the flooding of 13% of its agricultural land. Mauritania, Guyana and Jamaica are also among the biggest losers.
In the bank's rankings of the top 10 countries affected by a sea level rise, across six different types of impact, Bangladesh - often associated with rising sea levels - features only once. The country is listed as the tenth most affected by land area, with just over 1% likely to be flooded.
The report says: "The overall magnitudes for the developing world are sobering: within this century, tens of millions of people are likely to be displaced by sea level rise, and the accompanying economic and ecological damage will be severe for many."
It adds: "International resource allocation strategies should recognise the skewed impact distribution we have documented. Some countries will be little affected by sea level rise, while others will be so heavily impacted that their national integrity may be threatened. Given the scarcity of available resources, it would seem sensible to allocate aid according to degree of threat."
The bank says the study is the first of its kind, but admits it is not foolproof. It did not investigate the effects of milder sea level rise, which will be felt in the next few decades. And its methods were too crude to assess the fate of small islands, which are particularly vulnerable. It also fails to take into account adaptation measures put in place over the next century, which would lessen the damages, or storm surges, which would worsen them.
Nevertheless, its central message is clear: "There is little evidence that the international community has seriously considered the implications of sea level rise for population location and infrastructure planning in many developing countries."A separate Oxfam report last month investigated the situation on the ground in Vietnam, in the provinces of Ben Tre and Quang Tri.
Achievements at risk
The charity warned that the effects of climate change threatened Vietnam's development achievements. It is one of the few countries on track to meet most of its millennium development goals by 2015, and it managed to reduce its poverty rate from about 58% of the population to 18% in 2006. "Such impressive achievements are now at risk," Oxfam says. In 2000, Vietnam produced just 0.35% of world greenhouse gas emissions - one of the lowest contributions in the world.
It is not just rising sea levels that pose a threat; higher temperatures, as well as more extremes of weather such as drought and typhoons, will have a "potentially devastating impact on the country's people and economy", the report says.
Some communities are already adapting to changing weather patterns. Rice farmers are harvesting earlier, before the main flooding season, or growing a rice variety with a shorter cycle. But the report found countless cases of poor people across both Ben Tre and Quang Tri, who were ill-equipped to cope with the consequences of the climate changing.
Oxfam says that rich countries must step in - and quickly. "The amounts of investment needed are beyond [Vietnam's] budgetary capacity," it says. "International adaptation finance will be needed in the face of unavoidable impacts."