5. P&O
The oldest cruise line in the world gets a bad grade in terms of being environmentally friendly, according the Friends of the Earth study. Rated in the bottom ranks, P&O gets a ‘D’ for their sewage treatment system and an ‘F’ in the air pollution that they generate. The food, service and smells on the ships also paint a bleak picture, with guest complaints against rude staff, restaurants being closed all at the same time and odors that have caused many people to rename the company “Pee and Odor”. Consider P&O one of the cruise lines to avoid in 2015 until they literally start cleaning up their act.
