Which Great Lake was first to show intense effects of water pollution? 

A)  Lake Superior 
B)  Lake Ontario 
C)  Lake Huron 
D)  Lake Erie

Great Lake

Each of the five large, interconnected freshwater lakes located in North America on the Canada-United States border, constituting the largest group of freshwater lakes by total area.

Water Pollution

The contamination of water bodies such as lakes, rivers, oceans, and groundwater, caused by harmful substances resulting from human activities.

Lake Erie

The fourth-largest lake of the five Great Lakes in North America, known for its fishing industry, recreation, and as a critical source of fresh water.