Agence France-Presse: Eco-conscious customers who flock to one Washington store say they have chosen the environmentally friendly living shop because they know they are in little danger of being "greenwashed." "I can give you a ton of words that mean absolutely, positively nothing," said Daniel Velez, owner of Greater Goods, where the shelves are stocked only after careful, painstaking research. "The word natural. The word earth-friendly. It means nothing since it’s not legally defined. …