It's one of this country's greatest natural resources.
The federal and provincial governments have renewed their pledge to restore and protect the Great Lakes, by signing the Canada-Ontario Agreement on Great Lakes Water Quality and Ecosystem Health.
Sarnia-Lambton M.P. Pat Davidson says since 2006, Ottawa has invested more than $20 million to improve the Great Lakes.
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Efforts will increase to address algae blooms and help prevent aquatic invasive species from entering the lakes.