Climate change threatens to make the already difficult situation of food security in the world even worse. The Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) - based on the evaluation of many scientific studies - has made a critical assessment of the possible impacts of climate change on agriculture, livestock and fishing, particularly in the countries of the tropics and sub-tropics. The Food and Agriculture Organisation of the United Nations (FAO) also warns about the negative consequences, in particular for smallholder subsistence farmers in what are in..