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The united nations estimates that food production will have to increase 70 percent by 2050.
A world population growing in number and wealth will require one billion tons more grain each year and two hundred million tons more meat.
The food and agriculture organization says both gains will have to happen largely on an existing land through sustainable intensfication.
Officials say the new report provides the first globle assessment of the state of the planted land resources, it says large parts of all continents are exprencing damage, one forth of all land does discribe that highly degraded, the greatest ?? are losses of soil porperty, biodiversity and water resources.

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