From catastrophic floods in Pakistan that have left millions homeless and hungry to the aftermath of Haiti's devastating earthquake, relief efforts are under way in many parts of the world where disasters have brought food crises along with destruction. In Africa's Sahel region, severe drought has been followed by floods that are now threatening the food security of millions of people among the world's poorest. More than half of Niger's population - some 7 million people - as well as millions more in neighbouring Chad, Mali and Mauritania face hunger and malnutrition...
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