As we have seen above, the largest growing market for these technologies is in the now developing parts of the world (the South). This means not only that increasing financing needs to be secured for these critical investments, but also that most of the induced technological learning, and thus cost reductions, is likely to occur in these regions. In other words, there is a strong potential incentive to invest there, assuming appropriate institutional and financing arrangements. Tariffs are the rates paid per kilowatt-hour for electricity.