Detailed analysis of the impact of climate change on agriculture suggests that by the year 2060 global warming may decrease cereal production in developing countries by 9-11 percent. Africa may be particularly vulnerable to agricultural disruption caused by global warming. Myers estimates that 50 million people globally may be displaced due to climate change-induced famine. He also cites another estimate that predicts that the figure may exceed 50 million in Africa alone. Myers also warns that sea level rise and agricultural disruption will not the only causes of human migration.
Environmental refugees have significant economic, socio- cultural and political consequences.
They impose intolerable burdens in terms of food requirements on the territory they enter. At the same time, they flood the labour market, creating a slump in wages, and endangering the economic security of the local population. Myers suggests that political tensions over land claims may lead to significant political insecurity and possibly war.