Feb 05, 2009 — St. Lawrence River advocates, policy makers, and scientists will gather Saturday in Clayton for Save the River's 20th annual Winter Weekend conference. The day-long event at the Clayton Opera house will focus on the effects of climate change on the St. Lawrence and the Great Lakes. The event's keynote speaker Saturday night will offer a broader look at rivers across America. Tim Palmer has been writing about and photographing rivers for more than 25 years. Paddler magazine named Palmer "one of the 10 greatest river conservationists of our time". Palmer spoke with David Sommerstein.