Great Lakes are estimated at 900 trillion. The influx of parasitic lamprey populations after the development of the Erie Canal and the much later Welland Canal led to the two federal governments of the US and Canada working on joint proposals to control it. By the mid-1950s, the lake trout populations of Lakes Michigan and Huron were reduced, with the lamprey deemed largely to blame. This led to the launch of the bi-national Great Lakes Fishery Commission. "The Great Lakes: An Environmental Atlas and Resource Book" (1972) noted: "Only pockets remain of the once large commercial fishery." But, water quality improvements realized
Lagan Canal by the building of the M1 motorway along its route. There are proposals to restore the canal, to once again provide a navigable link between Belfast and Lough Neagh. Initially, a steering group was formed, with representatives from local councils, user groups and central government. The Lagan Canal Restoration Trust was a logical development of this group, and was formed as a company limited by guarantee in 2008 with representatives from the four councils which administer the areas through which the canal runs, and six other key partners, including the Northern Ireland Environment Agency, the Department for Culture, Arts and