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UN: Produce more food

28 November 2011, 09:08

Rome — The United Nations has completed the first-ever global assessment of the state of the planet's land resources, finding in a report released on Monday that a quarter of all farmland is highly degraded and warning the trend must be reversed if the world's growing population is to be fed.

The report was released, as delegates from around the world meet in Durban, South Africa, for a two-week U.N. climate change conference aimed at breaking the deadlock on how to curb emissions of carbon dioxide and other pollutants.

The report found that climate change coupled with poor farming practices had contributed to a decrease in productivity of the world's farmland following the boon years of the Green Revolution, when crop yields soared thanks to new technologies, pesticides and the introduction of high-yield crops.

The U.N. Food and Agriculture Organization(FAO) estimates that farmers will have to produce 70 percent more food by 2050 to meet the needs of the world's expected 9 billion-strong population. That amounts to 1 billion tons more wheat, rice and other cereals and 200 million more tons of cow and other livestock.

But as it is, most available farmland is already being farmed, and in ways that actually decrease its productivity through practices that lead to soil erosion and wasting of water.

That means that to meet the world's future food needs, a major "sustainable intensification" of agricultural productivity on existing farmland will be necessary, the FAO said in "State of the World's Land and Water Resources for Food and Agriculture."

Some examples of areas at risk: Western Europe, where highly intensive agriculture has led to pollution of soil and aquifers and a resulting loss of biodiversity; In the highlands of the Himalayas, the Andes, the Ethiopian plateau and southern Africa, soil erosion has been coupled with an increase intensity of floods; In southeast and eastern Asia's rice-based food systems, land has been abandoned thanks in part to a loss of the cultural value of it.

The report found that water around the world is becoming ever more scarce and salinated, while groundwater is becoming more polluted by agricultural runoff and other toxins.

In order to meet the world's water needs in 2050, more efficient irrigation will necessary since currently most irrigation systems perform well below their capacity, FAO said.

The agency called for new farming practices like integrated irrigation and fish-farm systems to meet those demands, as well as overall investment in agricultural development.

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- AP


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