Hidden hungerIN A market in southern Uganda two traders squat behind little piles of sweet potatoes and a sign that says “with extra vitamin A”. A passing shopper complains about the price: 10% more than ordinary sweet potatoes. Yes, say the traders, but they're better, bred with extra vitamin A. The bargaining goes back and forth, but the struggle to improve the crop has already been won. Since 2007, when an
Rust in the bread basket
