I make effort to minimize my impact on the environment. I eat plant based food, I walk to work, I avoid single use plastics... And, since I'm usually the last to leave the office, I turn off the lights.
Today we had to review the CCTV footage and we found out that the cleaning lady come an hour after we leave, turns on the lights on the whole damned floor, leaves and the lights remain on for the next 5 hours, with no one around, until the night guard makes his round.