negative afects of migration

The negative effects of migration are that the amount of food production in Brazil will decline severally as the farmers stop farming and making food.  This will also have a negative effect on the economy as the price of produce and other farm products rise.  Also the size of the cities will need to increase which will most likely affect the environment in a negative way.  Also the population will grow more crowded and the number of jobs available in the area will decrease causing more poverty.