ABSTRACT
In a multidimensional management system such as water hyacinth management and control, the decision-making process faces more challenge than making decisions in a purely commercial or environmental process because of a combination of ecological and socio-economic targets focused on public concerns. The cost-benefit analyses are essential for evaluating the economic implications of phytoremediation using water hyacinth. Information on natural science and technology can only provide an estimate of whether the management program will meet the final targets; in addition, the socio-economic expectations and the cost-benefit analysis can shed additional light on the planned budgetary expenditure and possible financial returns. From the point of view of the public, the management and control of water hyacinth and environmental protection all represent common good, some of which is invisible. The projects on this subject must be transparent and assessed reliably in both scientific and socio-economic contexts.
