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Africa is endowed with rich and diverse biological resources . Key factors in the success of the programme include a uniform technical design for easy replication ; quality control and monitoring of production ; installation and after-sales services tied with incentives for private companies ; and financial support for end-users , through a subsidy of US $ 70 – 150 per household biogas plant plus easy access to financing through micro-credit schemes ( Pandey 2004 ) . Given the rate at which natural resources are currently being degraded in the region , it is easy to conclude that the African environment is a highly threatened environment , and one in which the future seems mostly uncertain . However , soil types in the new climactic zones may not always be suitable for intensive agriculture as currently practiced in the main producer countries ( STOA 1998 ) . The person whose fortune was to be told picked a number and the corresponding answer was read aloud ; some answers were serious , some meant to be humorous . Quantitative assessment of the success or failure of policy initiatives and developments is not an easy task . The driving forces control trends which are themselves influenced by social , economic and environmental conditions ( Gallopin and others , 1997 ) . In many countries , this observance provides an opportunity to sign or ratify international conventions and sometimes leads to the establishment of permanent government structures dealing with environmental management and economic planning . Consequently , in looking at the future of Africa from 2002 to 2032 , we have combined all these efforts to produce quantitative descriptions and rich narratives of the various scenarios , which we believe will assist in the major steps that must be taken in the new millennium . Where the geographical location is suitable , solar thermal technologies such as solar cookers and water heaters are available for residential uses . Sustainable development means taking into account social , economic and environmental issues at the same time , not one at a time . Trade Organization Ministerial Conference , rich countries agreed to end export subsidies for cotton by the end of 2006 and for all agricultural products by 2013 .