70.9% of the Earth's surface is covered by water. Of that, 97% is in the Earth's oceans, 2.4% are in polar ice caps and glaciers, and the remaining 0.6% is in the land surfaceâ¦ water areas of the Earth.
Hypertrophic obesity is excessive weight gain in adulthood. Hypertrophic is when the fat cells get bigger. This is as opposed to Hyperplastic obesity, which is the gaining of fat cells. The latter only occurs during childhood, or if the person gains a lot of weight fast.
A widely accepted definition of obesity is body weight that is 20% or more in excess of ideal weight:height ratio according to actuarial tables. By this definition, 34% of adults in the U.S. are obese.. Excessive body weight has been shown to predispose to various diseases, particularly cardiovascular diseases, diabetes mellitus type 2, sleep disturbances (sleep apnea) and osteoarthritis. Obesity is one of the major risk factors for developing a heart attack, as well as hypertension and stroke.