echinoderm(Marine coelomate animals distinguished from all others by an internal skeleton composed of calcite plates, and a water-vascular system to serve the needs of locomotion, respiration, nutrition or perception)
eco-balance(An eco-balance refers to the consumption of energy and resources and the pollution caused by the production cycle of a given product. The product is followed throughout its entire life cycle, from the extraction of the raw materials, manufacturing and use, right through to recycling and final handling of waste)