It now goes by the seemingly harmless euphemism "Smart Growth." Check to see if there's such an organization in your town -- there is in mine. Watch what they do.
When you get them, look for payments to the Urban Land Institute, or ULI. While not directly connected to the UN or Agenda 21, they are an organization that "trains" cities and counties in implementing "Smart Growth" programs. If your city or county is a member of the ULI, they're already in the process of implementing Agenda 21.
Here in Idaho, I know the cities of Boise and Coeur d' Alene are ULI members. The Boise City Council has been tossing around terms like "mixed use-high density" housing, and "transportation hubs" (busses and rail) for years now. It's happening under our noses, and no one knows or cares. Scary stuff.
Scouts Out! Cavalry Ho!