Cruising and it's impact on the environment is becoming under more focus by cruise passengers, environmental groups and governments around the world. I explore the 5 things that I see and read that cruise lines are doing, and focusing on, to improve cruising impact on the environment. Some of these are about the ships, some about the ports and how passengers and ships interact with all of this. Find out what these are and what difference they should make to cruising and the environment.