Independent: The Saharan dust storms thickening Britains smog and coating cars from Cornwall to Aberdeen will become increasingly strong in the coming years as a nasty mixture of drought, development and intensive farming in North Africa pushes up air pollution, a leading dust expert warned yesterday. The rapid population growth in Western Sahel countries such as Chad, Niger, Mali and Mauritani in the past 20 to 30 years has prompted a surge in agriculture which has greatly increased the amount of dust, Dr...