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From 1836-1840 Garibaldi fought for the Rio Grande do Sul , the southernmost section of the Brazilian empire , then seeking to establish itself as an independent republic . Additional resources need to be committed to environmental protection and management at the national and international levels , to ensure a sustained supply of fertile and stable soils , good quality water , healthy fresh air , medicinal and nutritional products , and space for recreation . They were typically printed on a single sheet of low-quality paper , folded to make eight , sixteen , or twenty-four pages , though some examples were longer still . What we have provided in this work , therefore , is both the quantitative and qualitative evaluation of the future of our region , in the hope that the minds of people in positions of authority , who can make and execute policies , are drawn to the crucial issues raised regarding desirable and undesirable trends . In Africa , however , there is reason for concern , because the process of transformation has been unsustainable and continues to be so .