Do remember that though Government Projections et , may be given in Energy Papers 62 and more recently68, and that these may be used as a guide, but you should attempt to derive your own estimates not just rely on what is published. Extra credit will be given in the seminar presentations and your individual reports if you show evidence of this. An example of how you might proceed is shown here for a wind energy example. You may read from the literature, for instance, that perhaps 20% of UK Electricity could be supplied by wind energy. How many wind turbines would this be? The current thinking is that turbines of about 2 MW are the most effective, and that the overall load factor is around 30%(currently this is nearer 28.5% averaged over all wind farms). We currently have just over 2000MW installed. Thus to provide 20%of the current 80GW+total generating capacity would require 16000 turbines which have ~80+m blade diameters and are 100m high at the hub. Would this number be acceptable? Since they should be spaced at approximately 10 blade diameters, they would cover about 10000 sq km of land? How many will have to be constructed each year? Do you think this is feasible in the time span? What about the supply chain? You must also consider problems of implementation. By all means consider an optimistic scenario, but also consider a scenario based on central assumptions, and one on pessimistic assumptions, With regard to time scale of development. Thus for wind energy, do not assume, for example, that 5000MW of wind power might be available by 2010 if your source of reference which suggested that it might was written in 1990. Clearly you must add 15 years to the time scale as we are now 15 years further on. We currently have about 2000+ MW of wind energy, but ,any recent planning applications for wind turbines have turned down.