Over time, the body becomes accustomed to the effects of Norco. If the drug is stopped or decreased too quickly, withdrawal symptoms may occur. Norco withdrawal can occur with chronic, legitimate use of the drug, as well as with Norco addiction.
Definition. A megacity is defined by the United Nations as a metropolitan area with a total population of more than 10 million people. Some definitions also set a minimum level for population density (at least 2,000 persons/square km). A megacity can be a single metropolitan area or two or more metropolitan areas, which have grown to such an extent, that they now form one urban area.
As has been the case for nearly six decades, Tokyo remains the largest urban area in the world, with approximately 37 million. New York, which Tokyo displaced in 1955, has fallen to seventh largest and has the lowest population density of any megacity, at 4600 per square mile or 1800 per square kilometer (Note 2). London, which New York displaced in the 1920s never became a megacity due to the imposition of its greenbelt.