<span>When an individual is more than a couple of meters underwater, the air pressure in the lungs is greater than the air pressure at the waters surface. If a snorkel were used, it would move the air from the lungs to the surface, making it very difficult to breath
Unsaturated fats<span> are typically liquid at room temperature. They differ from </span>saturated fats<span> in that their chemical structure contains one or more double bonds.</span>
