I've worked with the cruise industry for 20 years now, and the changes I have seen in much of their operations are hugely significant. They take steps as little as.... We look at aluminum beverage cans that usually come with a plastic ring around six cans. Cruise lines won't accept them that way. They simply don't purchase them that way.
We take people on ship tours, environmental ship tours. When we take them to the solid waste handling area, their eyes.... It's amazing what they suddenly realize. Everything that is collected on a cruise ship goes to the solid waste handling area. Every bag, every can, everything is sorted. Everything that can be recycled is recycled. Everything that can be offloaded is offloaded. No plastics go in the ocean.