"Greenwashing" - never heard that term. Gonna use that one!
greenwash
verb, transitive. (a) To mislead (the public) or counter (public or media concerns) by falsely representing a person, company, product, etc., as being environmentally responsible; (b) to misrepresent (a company, its operations, etc.) as environmentally responsible.
The earliest source the OED found was in 1989, in The Daily Telegraph (London).