Sources of sustainable design materials from nature would include these aquatic plants. Known as pests, water hyacinths are now known as a versatile natural raw material. Here are 3 basic things to know about these plants: • Originally intended for ornamental purposes. Native to South America, water hyacinths were imported to be used as decorative plants. • Considered as pest in some countries. Clogging waterways and impacting natural balance in waters are only some of the unfavorable effects of these plants. Fifty countries are now infested by thick mats of water hyacinths. • Plant parts can be eaten but not encouraged. The Handbook of Energy Crops mentioned that leaves and stalks are eaten but are NOT RECOMMENDED as these can cause itching. Like us on Facebook and tell us other facts about water hyacinths.