Heating up water for a wash cycle can use a lot of energy. You’d be amazed by just how much of a difference switching from 40°C to 30°C can make. Modern washing machines are designed to clean just as effectively at lower temperatures, and so are detergents like OMO.
Opting to line dry over using the tumble dryer is an important choice. Cutting down on dryer time can help you make big savings on your electricity bill and in turn cut down your impact on the environment.