Nicaraguans build Costa Rican buildings. Paraguayans pick Argentine crops. Nepalis dig Indian mines. Indonesians clean Malaysian homes. Farm hands from Burkina Faso tend the fields in Ivory Coast. Some save for more expensive journeys north, while others find the move from one poor land to another all they will ever afford. With rich countries tightening their borders, migration within the developing world is likely to grow. Read full article here.