Nobody asked me, but the idea of spending $9 billion to build a third bridge across the Chesapeake Bay still seems absurd, even more so than when I first heard the idea. I say that for several reasons: The effects of climate change on sea-level rise; the need to reduce harmful emissions as the transition to electric-powered cars and trucks takes many more years; the desire to preserve open space, the Eastern Shore’s rural character, and the general quality of life on both sides of the bay; the likelihood that the cost of a new bridge will surpass the current estimate; and Maryland’s many other spending priorities, well ahead of a third bridge.