The annual health-care costs for people who are extremely obese are almost twice those of normal-weight people. Very sobering is the fact that severe obesity is increasing at a much faster rate than moderate obesity, quadrupling from 1986â2000.6.
As a sea is connected to the oceans, which are salt water, most seas are also salt water. This is not a distinguishing feature between a sea and a lake, however, as lakes are more commonly freshwater but can be salty depending on their source and their surroundings.
Moving up in size, a sea is a large body of water that is surrounded by land or attached to another body of water. The Caspian Sea is one that is surrounded by land. The Mediterranean Sea is one that is attached to another body of water, in this case the Atlantic Ocean.