LUSAKA Monday, November 10, 2008 (IRIN) - Lower copper prices will hurt the poorLUSAKA, 10 November 2008 – The fall in international copper prices is causing unease in Zambia, one of the world's largest producers, whose impressive economic growth in recent years has been based on copper exports.Frederick Bantubonse, general manager of the Zambia Chamber of Mines, told IRIN: "It's causing a lot of concern; we are selling, well and good, but the pricing is not as profitable as we would like it to...