Social media can certainly motivate people for good and otherwise. Calls to action to clean up the oceans, rivers, and beaches have galvanized volunteers and gone viral. But given the magnitude of the problem, how should we assess the impact?…

By Paul Solman

Almost twenty years since the Exxon Valdez oil spill, the Supreme Court decided Wednesday to reduce victims' compensation in Alaska. Two journalists who have covered the story discuss the decision and how the impact of the accident still lingers in…