Climate impacts will affect agriculture the most, a key sector in the poorest countries and major source of income, food security, nutrition, jobs, livelihoods and export earnings. Emission reduction policies that protect the poor need to be focussed on, states the international agency. By 2030, crop yield losses could mean that food prices would be 12 per cent higher on average in Sub-Saharan Africa. The strain on poor households, who spend as much as 60 per cent of their income on food, could be acute. The resulting malnutrition could lead to an increase in severe stunting in Africa of 23 per cent.