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.
Â· just now. Asker's rating. Report Abuse. An island is a tract of land completely surrounded by water. A key or cay is a small low island. ChaCha. Difference between hill and mountain:A natural elevation in the earth's surface. The only difference is, is that a mountain is bigger. just now. Asker's rating. Report Abuse. An island is a tract of land completely surrounded by water. A key or cay is a small low island. ChaCha. Difference between hill and mountain:A natural elevation in the earth's surface. The only difference is, is that a mountain is bigger.