Greenwashing is marketing something of little or no green value in a way that suggests that it is greener than it actually is.  Recently, Green Building Advisor published an article that categorizes common greenwashing practices.  To be honest, avoiding greenwashing, or at least conflicts in properly identifying what is green, can be a real challenge.  Carpet that is made from recycled content that off gasses; a product with a level of embodied energy but that is very durable.  Nonetheless, more often than not, greenwashing is a deliberate attempt to misrepresent information.