Megaregions of the United States are clustered networks of American cities, which are currently estimated to contain a total population exceeding 237 million America 50, a project of the Regional Plan Association, lists 11 megaregions in the United States, Canada and Mexico Megapolitan areas were explored in a July 05 report by Robert E Lang and Dawn Dhavale of Agenda 21 is an action plan of the United Nations related to "sustainable development" and was an outcome of the United Nations Conference on Environment and Development held in Rio de Janeiro, Brazil, in 1992, where 178 governments (including the United States) voted to adopt the program The number 21 refers to an agenda for the 21st Century Agenda 21 policies date back to the 1970's but it got its real start in 1992 at the Earth Summit in Rio de Janeiro when President Bush signed onto it President Clinton signed it later and continued the program in the United States Agenda 21 is 'softlaw' and did not have to be voted on by the Congress
2
