Forgot bike lock keys – added to carbon footprint

Beautiful morning yesterday and really enjoyed riding to the station. Went to lock up my bike and I was stunned to find that I had my wife’s car keys with me, not my ring with the bike lock keys. So, back for the return ride home. Couldn’t just switch out keys because E. Norwalk, a secondary station, wouldn’t have a train for some time, which required me to drive to the S. Norwalk station so I wouldn’t be late for work. Not a terrible thing overall, but who ever thought that taking the wrong keys could have an enivornmental impact?