PORTLAND - Supporters and critics showed up in Portland to hear former Vice President Al Gore's speech on global warming Wednesday night.
The former vice president's arrival was greeted with a protest in the park, but inside Keller Auditorium at Portland State University, a crowd of more than 2,300 focused on Gore's appeal to reduce carbon emissions and fight U.S. dependency on foreign oil.
Much of the Nobel Prize winner's speech targeted policy development for renewable energy. Gore called solar and wind power ideal alternatives to oil.
