Definition. Thoracic surgery is the repair of organs located in the thorax, or chest. The thoracic cavity lies between the neck and the diaphragm, and contains the heart and lungs (cardiopulmonary system), the esophagus, trachea, pleura, mediastinum, chest wall, and diaphragm.
If youâre reading this, chances are you switched on a light. But for the 1.3 billion people around the world who lack access to electricity, darkness is a reality. There is no electric light for children to do their homework by, no power to run refrigerators that keep perishables or needed medicine cold, no power for cooking stoves or microwaves.
Our household electricity use has been 2,000 kWh each of the last few years, which means it is about 700 kWh per person. We benefit from not using electricity for heating or cooling, although our electric oven is a big source of demand.n Brazil, Mexico and China per person use is just 500 kWh, but growth is very different. In Brazil residential use per person has been stable over the last 20 years, whereas in Mexico it is up 50% and in China it has increased 600%.