Although renewable energy resources are now being utilised more on a global scale than ever before, there is no doubt their contribution to the energy economy can still be greatly increased. Recently international support for developing these relatively new sources of energy has been driven by their benefits as assessed by reduced environmental impact, particularly reduced greenhouse gas emissions. After several decades of continuous but somewhat erratic funding for research and development of renewables, it is time to take stock of the key issues to be addressed in terms of implementation of major renewable energy programmes on a large scale worldwide. One of the first steps in this process is the identification and encouragement of reliable continuous markets both in developed and developing nations. Future energy policy and planning scenarios should take into account the factors necessary to integrate renewables in all their diverse forms into the normal energy economy of the country. Other critical factors in market development will include the mass production of high quality, reliable and reasonable cost technical products and the provision of adequate finance for demonstrating market ready and near market renewables equipment. Government agencies need to aid in the removal of legislative and institutional barriers hindering the widespread introduction of non-conventional energy sources and to encourage the implementation of government purchasing schemes. Recent moves by companies in Australia to market ‘green energy’ to customers should also aid in the public awareness of the ultimate potential of renewables leading to greater use in the industrial, commercial and domestic sectors.