RMI (Rocky Mountain Institute) provides a timeline-based interactive map depicting the U.S.’s historical imports of oil since 1973. Map controls can slide to specific dates and highlight five periods by major oil crises, including history briefs in the sideline. Map units can be displayed in oil or U.S. dollars. Map can also be put on auto-play. This is a well-done interactive map and interesting visualization of the flow of resources over time.
Rocky Mountain Institute is an independent, entrepreneurial nonprofit think-and-do tank™ that drives the efficient and restorative use of resources (from the RMI website).