There´s a long list of actions that each of us can take to reduce the carbon footprint of lab work. Closing the sash of the fume hood, shutting off equipment, turning off the lights etc etc.
But those actions can be hard to remember when you´re busy in the lab and focused on something else -- such as the experiment that you´re doing.
You can use stickers and signs as friendly reminders to make it easier for you and your lab mates to do your research AND take green actions.
So once Corona allows you to return to the lab, maybe you can consider if your lab -- and the planet -- would benefit from friendly reminders here and there?