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Published in the series Tinsley 's Cheap Novels , this was a " yellowback " ; rather like modern paperbacks at the airport , yellowbacks were designed for railway travelers , " sold at the station , read on the train and perhaps left behind at the end of the journey " ( Feather 136 ) . The current state of the African environment , and the vulnerability of large populations in the region to environmental and human-induced disasters , pose an additional challenge to studies of the environment . These have particularly serious consequences for Africa because of the difficulties experienced in the region in predicting their occurrence and in mitigating their effects , and also because many African countries lack the financial resources to make adequate and timely recovery before the next climatic event . Almost all African countries experience problems of water quality and are struggling to upgrade water treatment and wastewater processing plants . Conversely , some areas experience lower than average rates of population growth , due to below-average intrinsic rates of population increase and to emigration . It could endanger the very ground on which nearly half the worlds population Live - coastal cities such as Lagos or Cape Town , which face inundation from sea levels rising as a result of inciting icecaps and glaciers . His experiences in South America determined his future career , shaping the military genius which later enabled him to resist the French and to defeat the Neapolitans and Austrians . His firsthand account , based partly on " notes taken and letters written at the time the events occurred , and partly from memory , " narrates his experiences in Europe with Shelley and Byron and their circle in 1822-1823 . The countries of the Horn of Africa and the Sahel are most prone to drought ; those of Western and Central Africa experience flooding periodically . Focusing on poetry by women from the fifteenth century to the mid-nineteenth , the editor claims to " supply a want which must have been frequently experienced by every student of our literary annals . International cooperation to promote research and development , mobilize investment , create markets or share experiences could form a powerful tool to strike while the iron is hot . Most other countries , particularly those in Northern Africa , the Horn of Africa , and in the Sahel , experience extreme variability and unpredictability in rainfall as well as frequent drought . Climate change is likely to bring increased frequency and severity of flooding and drought to those areas already experiencing variability in rainfall .