Agenda 21 is described as "a non-binding, voluntarily implemented action plan of the United Nations with regard to sustainable development. It is an action agenda for the UN, other multilateral organizations, and individual governments around the world that can be executed at local, national, and global levels."

Several Democratic lawmakers, including Nancy Pelosi, John Kerry and Harry Reid have spoken in favor of Agenda 21, while some Republicans have spoken against it.

Opponents say that Agenda 21 "is erosive of American sovereignty".

Local activist Bob West of Grass Roots Yakima Valley is one of those opposed to Agenda 21. He discussed the issue on Monday's Mike Bastinelli show.

Click this player to listen to the interview.

Find out more about Agenda 21 here.