Detergents are pretty bad for the environment. They're made of chemicals that surround dirt to whisk it away from your clothes, but those chemicals stick around and do nasty things. Earth friendly detergents are better, but this solution may be the best yet - Haier's Wash2o uses no detergents at all. Instead, it separates H2O into positive and negative ions, breaking the surface tension and allowing it to surround dirt and whisk it away.... just like detergent. (At least in theory.)
It will be available in France soon and will cost about 700 Euros.