While projections may vary and a scientific consensus is in the process of being reached on the affects global climate change will have on the Great Lakes, it is important to understand the ecological, economic, and social implications of rapidly changing ecosystems in the Great Lakes. According to many projections, a 3-5 feet (1-2 meters) drop in lake levels can be expected throughout the Great Lakes. While lake levels do vary naturally and are subject to human regulation through locks and dams, a net loss of that amount of water will be devastating to ecosystems and communities across the Lakes.