Do you have a plot of land? Are you are planning on acquiring one? Have you been thinking of what sustainable project to carry out on it? Are you a recent graduate thinking of venturing into agriculture? Are you thinking of what to do in your retirement as a steady stream of income? Perhaps you are thinking of a secondary or tertiary source of income to serve as a rainy-day fund. Have you also thought of of investing in a profitable and yet renewable and sustainable venture? Have you considered fish farming?