[word=Great] [lemma=□]
[word=Great] [lemma=lake]
The project is expected to retain 96 positions at the Great Lakes Business Unit within the first three years of the project 's initial operations . New threats to the well-being of the Great Lakes ecosystem are becoming better defined . For example , UNESCO and the Earth Institute are working with the Cambodian government to restore the eco-system of the Tonle Sap Great Lake , which provides the fisheries for more than one-million people . During the rainy season , Tonle Sap , or Great Lake , fed by the overflowing waters of the Mekong River , grows to six times its normal size , to more than 16,000 square kilometres , thus absorbing floods and releasing the water gradually . For both Great Lake subsystems ( upper and lower ) , the uppermost lake goes terminal before the lowermost lake ; this is not strictly necessary . In particular , the finding that PCB levels in the waters and in Great Lake fish must decrease by one to three orders in magnitude to achieve state and federal public health is a call for action . There is more to the Great Lakes than just the lakes . Our re-assessment of Great Lake levels included development of a new synthesis of glacio-isostatic rebound using an empirical model to describe vertical earth movement with time ( 20 ) . However , lake-effect snows are not restricted to the Great Lakes shorelines ( i.e ., Buffalo , Syracuse , Rochester , Erie , Muskegon , and South Bend ) , but are most common and heaviest there . The IJC has made a series of recommendations to prevent further introductions of aquatic invasive species in the Great Lakes .