b'Great LakesThe Great Lakes basin is one of the richestand most ecologically diverse ecosystems on the planet. Its network of lakes, rivers, and islands forms the largest freshwater system on Earth. Despite its size, this ecosystem is fragile and sensitive. Centuries of research and observation have shown that when our lakes are healthy, our people, fish, lands, and economy are too. 365 million gallons of rainwaterare eliminated15 New programs have prevented more than 1 P one million pounds of phosphorus annually from the Detroit sewer system through GSI Phosphorus from entering the Great Lakes 236The Journey Forward| ENVIRONMENT'