Oregon has set ambitious goals for reducing our carbon emissions by 2020. But if all the currently proposed highway projects are built, any reductions that are achieved in other areas will be canceled out by increased auto use. How do plans to replace the I5 bridge between Washington and Oregon fit into this dilemma? While the proposed replacement bridge is being touted as a "green" bridge, most scenarios show that the currently proposed 12-lane bridge will only increase car trips across the Columbia River and help defeat the region's goal to dramatically reduce our carbon footprint. Should the new bridge have fewer lanes? Should there be tolls? Will light rail and bike lanes help reduce driving? Or should we not build a new bridge at all?