The report says sustainable development(可持续发展) of urban areas requires coordination and investments to deal with important issues，which include land use，food security，job creation and transportation.

　　Willem Van Der Geest，who is with the United Nations

　　Department of Economic and Social Affairs，says cities need to work closely with rural communities so that food supplies can be secured，and the environment can be protected.

　　“We need enough integration(整合，融合)with cities...An integration between the rural and urban economies is absolutely vital for issues of nutrition，food security，and environmental sustainability.”

　　The report says development in a sustainable way is important to end poverty.The report also examines the problem of food insecurity，which affects hundreds of millions of people around the world.One in eight people still severely lack nutrition.

　　UN officials say some things are clear.The Assistant Secretary­General for Economic Development，Shamshad Akhtar，says world food production will have to increase by 70%，that increase will be needed to feed the additional 2.3 billion people expected on the planet by the middle of the century.She says an important part of meeting that need is to waste less food.“There has to be efforts to reduce food wastage.”

　　Food and nutrition security are core elements of the sustainable development agenda.

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