This is one of my favorite TED talks... and it fits pretty well on a Monday morning after having spent part of my week-end hand washing. (I am so grateful to have a cleaning lady that does the additional wash for me today).
In rural areas in developing countries, washing cloth takes a tremendous amount of time. Women need to carry water home for washing or carry all the wash to the water point. It is laborious work, which is also pretty bad for the back. As Hans Rosling mentions, women emancipation can only come if they get more time by doing household work more efficiently. He also mentions that this efficiency gain that all women around the world wish to have will create more pressure on the environment.
Some months ago i found this article http://www.gizmag.com/giradora-pedail-power-washer/23548/ about a pedal powered washing machine that could have similar effects described in Hans Rosling's TED talk, namely giving women more freedom and time for the children, without using more electricity, without additional pressure on the environment!
It is definitely a technology worth to look at!