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Bassi , among the most attractive of the nineteenth-century Italian patriots , is described by the eleventh edition of the Encyclopaedia Britannica as " a gentle , unselfish soul , who , although unusually gifted , had an almost childlike nature . The study concluded that global warming could cause an overall reduction in global food production potential due to lack of soil moisture ( Wang 2005 ) . Red List Indices ( RLIs ) use information from the IUCN Red List to illustrate net changes in the overall threat status of sets of species , based on their population , range size and trends . Continued efforts in the area of environmental monitoring , surveying and remote sensing , data compilation and verification , capacity building and international cooperation are modestly improving the overall data situation . Africa 's climate is characterized by considerable variability and by extreme climatic events such as droughts , floods , and cyclones . The RLI for the world ’ s birds shows that that their overall threat status has deteriorated steadily since 1988 , in all ecosystems and biogeographic realms . Monitoring of climatic patterns and strategies to alleviate the pressures that economic growth places on terrestrial resources are additional priorities if Africa is to achieve sustainable development and protect its resource base . As land degradation spreads and food insecurity grows , as a result of climatic variability and global warming , more and more people are forced to migrate to urban areas , for example , in search of work and other opportunities . The wood engravings on the wrappers of the two volumes show , respectively , the Roman wolf and Gallic cock under the republican Phrigian cap , and Napoleon III , flanked by imperial flags and surmounted by a crown . These are exacerbated by the impacts of climatic variations and interacting with the unique biophysical dynamics , thereby reducing coping capacities for most of the people who are already living in environmentally fragile areas . The Africa region is characterized by diverse patterns of elevation , geology , climatic variability and vegetation types . Environmental sustainability was further integrated into overall economic planning in the region .