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Originating in South America, cassava is now grown in over 100 countries around the world. It is the third most important source of calories in the tropics after rice and maize. Its caloric value, as well as its ability to tolerate dry conditions and poor soils, makes it a key food security crop in developing countries, particularly in Africa. As demand for food grows, there is an urgent need to increase yields in the face of such challenges as climate change, threats from pests and diseases and the need to make cultivation more resource-efficient and sustainable.

Drawing on an...

Tourism is now known as the world s largest industry and a major foreign exchange earner for many countries. With continuously growing tourist numbers, pressure on resources increases, and there is a need to preserve and protect natural, cultural and historic resources. Various more sensitive forms of tourism have emerged and in recognition of the need for this development the United Nations proclaimed 2002 as the International Year of Ecotourism. This book introduces the reader to a number of case studies from different parts of the world and illustrates opportunities and constraints...