The US-Canada border area contains the North American Great Lakes (Superior, Michigan, Huron, Erie and Ontario), which together make up the largest freshwater area on Earth. Their total area is 246,000 km2, almost twice the size of the Adriatic Sea.
The lakes are interconnected and have great traffic importance because they are surrounded by densely populated and economically highly developed area, and on their shores large cities and important industrial centers have developed.
At the beginning of 20th Century industrial manufacturing was on of the main occupation of the inhabitants in the region of the Great Lakes.
This led to the creation of mushroom cities, as the population was growing very fast.
The primary function of the Environmental Protection Agency (EPA) is to ensure that business and individuals do not pollute the environment to the extent that it is detrimental to other citizens.
President Wilson created the War Industries Board to set production standards and coordinate railroad and shipping efforts. The National War Labor Board secured the cooperation of American workers by setting higher wages and an eight hour workday, and recognized the right
