As we were driving on the Jersey Turnpike on our way back from Washington, DC, yesterday, David and I wondered: Wouldn't it be a different experience traveling the Turnpike if you knew what was coming out of those roadside smoke stacks, if you could identify those foul odors? What if you had a GPS in your car that could look up specific factories on the EPA's Toxic Release Inventory Explorer as you drove? It's technologically possible today. I wonder if someone will make it happen.