You can save energy by the way you wash your clothes with these tips:

Washing machines that heat their own water (i.e. connected to cold water only) will use more energy than those connected to an off-peak electric or gas hot water service.

An overloaded or over-sudsed machine uses more energy and does not clean efficiently.

Try to wash only when you have a full load. If you need to wash a partial load, adjust the water level accordingly.

Try to use either cold or lukewarm water.

Front loading machines can be up to 15% more efficient than top loading machines. In general they operate with lower water consumption, high speed spin dry and a gentle washing action.

Use a lower wash temperature or economy wash (this uses existing hot water) and do not under fill - wash full loads whenever possible! Use energy and water as efficiently as possible.