Seattle Post Intelligencer: Seattle Mayor Greg Nickels and Sen. Ed Murray, D-Seattle, want car owners to warm to the inconvenient truth of cutting vehicle emissions. And they’re aiming for a place all drivers will feel it — the pocket. Senate Bill 6923 would impose a vehicle excise tax on all passenger vehicles based on EPA ratings of a cars’ fuel efficiency. For example, the owner of a hybrid car such as, say, a Toyota Prius, would pay $60 in annual taxes, whereas the owner of a Hummer H3 would pay …