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The dimensions of human vulnerability analysed in this chapter also include social and economic aspects , that is , poverty , food security , health , civil strife / conflicts , economic dimensions and governance . It would be useful , perhaps , to distinguish between the generally accepted chapbook which contains a small number of pages , and the inexpensively produced larger work , destined for the same reading public and in some instances carried in the same pack — Graham 's History of the Rebellion , and early editions of Pilgrim 's Progress too . The overall trend in the total surface of protected areas has been steadily upward during the last decades in all regions of the world , but has been levelling off somewhat since 2000 . All the early editions , like this one , were bound in purple , the color of mourning , rather than in Tennyson 's usual green cloth . Human vulnerability to environmental change has global , local , social and economic dimensions . The total number and area of marine protected areas is relatively very modest , with about 4 000 sites , covering 0.5 per cent of the ocean surface ( Chape and others 2005 ) . It is rather a question of transformations in the entire relations of life in all its great outlines . At the global level , 17 per cent of the protected areas are currently not classified under the IUCN scheme . Several regions have a significant proportion of non-IUCN classified protected areas , most notably Latin America and the Caribbean . In that quarter of an hour of scientific prose , in which we are living at present , no thinking man will believe any more that the great mass of believers in those associations of Christians had any accurate understanding of the different dogmas , or of the subtle discussions of the learned and professors . In Eastern Africa , encroachment of human settlements into protected areas and pastoral areas outside of reserves and their cultivation are priority concerns .