Why are the Great Lakes an important waterway?

These vast inland freshwater seas provide water for consumption, transportation, power, recreation and a host of other uses. The Great Lakes are one of the world's largest surface freshwater ecosystems.

Explanation:

i think the answer is the one about environmental and social health.

hope this

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.