To allure a greater number of investors, new models are required. One way is to support funds and bonds that focus on green projects, thereby allowing investors the flexibility to add or subtract items as it suits their portfolios. Also important is the development of a secondary market for solar projects so that investors can turn over their risk to another, should their investment priorities change. Right now, a local project requires a 25-year commitment. That's tough for most investors to consider in a still evolving marketplace. Regardless, contracts should be written with clear exit strategies for all parties. What should be included in such clauses? How would these clauses be written differently in the Middle East or in Africa, than they are now written in other markets?