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Concerns over immigration and security have prompted the US government to erect more than 1,000km of fencing along the Mexican border. But the contentious plan which cuts through private property in some areas has sparked anger among some US homeowners and farmers. Al Jazeera's Nick Spicer reports from Brownsville, Texas, along the Mexican border.

The number of children crossing the border illegally from Mexico into the United States without their parents is growing dramatically, a report says.

Population Growth BBC Documentary

Climate change: a development challenge Climate change: building the resilience of poor rural communities Desertification Fighting water scarcity in the Arab countries Fighting rural poverty: the role of ICTs Food prices: Smallholders can be part of the solution The future of world food security Land tenure security and poverty reduction Linking land and water governance Remittances Rural finance: Small amounts making a big difference Women

The Costa del Sol is famous for its tourists and beaches but just behind them is a hidden world of industrial greenhouses where African migrants work in extreme conditions

[Submitted by Sara]

USA - Immigration Laws.

Mexico: 500 migrants found in trucks in Chiapas

More than 2,000 Roma (Gypsies) who fled Kosovo during the conflict in the 1990s still live in Konik refugee camp near Podgorica, the capital of Montenegro.

Spiralling global conflicts and worldwide instability have forced millions of people to leave their homes and seek refuge either abroad or in their own countries. The latest figures do not include the wars in Sri Lanka and Pakistan's Swat valley, which have displaced thousands more

Wars, famine, and natural disasters are just a few of the reasons people are forced to leave their homes and flee their countries. Around the world, millions of refugees are waiting, sometimes for a lifetime, to return home. Here is a look at who they are.

People are moving around the world constantly-either toward opportunity or away from misfortune and fear. This is where people are going, and where they are coming from.

A filthy squat in Calais is home to 50 Eritreans who daily try to cross the Channel seeking asylum in Britain. Here are their stories.