Not to be confused with volume overload. Hypervolemia, or fluid overload, is the medical condition where there is too much fluid in the blood. The opposite condition is hypovolemia, which is too little fluid volume in the blood. Fluid volume excess in the intravascular compartment occurs due to an increase in total body sodium content and a consequent increase in extracellular body water.
The smell was put into natural Gas in the aftermath of a school explosion in New London Texas 1937. 300 students and faculty members lost their lives after the school exploded and was leveled when the trapped natural gas was ignited. The School was being fueled by gas directly from the near by oil wells.
But, like any energy source, natural gas must be used properly. Since natural gas is colorless and odorless, we add a harmless, non-toxic chemical that makes it easier to detect a gas leak before it can create a hazardous situation. The chemical, called mercaptan, smells a lot like rotten eggs. If you aren't familiar with it, call Columbia Gas of Massachusetts at 1-800-688-6160 and ask for a scratch-n-sniff card that provides you with a sample of the odor. In a concentrated form, the smell is almost unbearable.