Zebra mussels, an exotic species that most likely first entered the country in the late 1980s aboard ballast water from an Eastern Europe harbor, can harm ecosystems and pose problems for electrical utilities, municipal water supply treatment plants, industries, and boats.
(an exotic species; most likely entered; the country; L:in the late 1980s aboard ballast water; T:first) (Zebra mussels; can harm; ecosystems) (Zebra mussels; pose; problems for electrical utilities, municipal water supply treatment plants, industries, and boats)
an exotic species Zebra mussels Zebra mussels
most likely entered can harm pose
the country L:in the late 1980s aboard ballast water T:first
ecosystems
problems for electrical utilities, municipal water supply treatment plants, industries, and boats