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.
Difference between Sea Water and Fresh Water. Water covers a vast amount of space of up to 71% of the Earthâs surface. This is inspiration for the Earthâs nickname as the blue planet. All animals, plants and humans need water in different percentages to sustain life.