Environmentalist Blackwelder discusses significance, impact of Rio+20 talks

As the United Nations' Rio+20 sustainability conference kicks off, what impact could the discussions have on the global economy amid growing populations? During today's OnPoint, Brent Blackwelder, founder of Foundation Earth, president emeritus of Friends of the Earth and the founding chairman of American Rivers, explains why he believes the conference could be a game-changer and explains the role the United States could play in the negotiations.