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.
The term megacity entered common use in the late 19th or early 20th centuries; one of the earliest documented uses of the term was by the University of Texas in 1904. Initially the United Nations used the term to describe cities of 8 million or more inhabitants, but now uses the threshold of 10 million.