ABSTRACT
The world has known water hyacinth since 1816 when it was first recorded. Over the centuries, the plant has changed its status from a beautiful ornamental plant to a noxious weed or invasive alien species that negatively impacted natural aquatic systems and socio–economic development. However, in some situations, positive effects of water hyacinth were reported as a good macrophyte for phytoremediation. It is well known that a greenhouse effect has resulted in an elevation of average surface temperature on Earth; increasing water temperature may allow water hyacinth expansion further north in the northern hemisphere and further south in the southern hemisphere. It can be safely assumed that invasion of the global fresh water systems by water hyacinth will not stop but rather accelerate due to global warming. In addition to expanding the water hyacinth range, global warming will also extend its growing season and increase its growth rate.
