The Atlantic Ocean and the Great lakes have different elevations because of canals and locks that help in bringing ships to navigate through the seaway. The canal is human-made waterways that permit ships from both sides to enter and reduces the time of journey. The locks in canals help in altering the level of water of the canal by filling it up or decreasing it.
Ya it is real because we are living in a same planet every thing is linked with each other. it was the great hypothesis of the world one does pollution and all of us have to face it .
