Limit your time in the shower and turn off the water when soaping up, this saves 50% water!
Prefer long cycles or “eco” cycles for the dishwasher washing machine. Admittedly, they last longer, but they consume less water and electricity (30% to 45% less).
When you cook, put a lid on the pan to optimize cooking. You will gain up to 30% electricity!
“It's not Versailles here!” Oh no! So don't forget to turn off the light when you leave a room