According to the American Gas Association, 62 million homes in the U.S are heated using natural gas. As of 2009 this number represented about 56 percent of households in the United States. Approximately 23 percent of the total natural gas consumed nationwide is used for residential purposes.
The Tao Te Ching, as this writing came to be known, has influenced millions during the last 2,500 years. Learning to be human was the goal of Confucianism. According to Confucius, each person should act with virtue in all social matters; family, community, state, and kingdom, to ensure order and unity. Man's virtue in all its forms is called jen..
Nonetheless, Confucianism survived this suppression, some say because a scholar hid the texts in the walls of his house. After the Qin, the new Han Dynasty approved of Confucian doctrine and sponsored Confucian scholars, eventually making Confucianism the official state philosophy (see Emperor Wu of Han). Study of the Confucian classics became the basis of the government examination system and the core of the educational curriculum.