Royal Caribbean Cruises keeps Mother Nature well on the bow, from using tiny air bubbles to freezing rubbish in its efforts to protect the environment.

“There is a consciousness of the need for sustainability throughout the company,” chairman and chief executive Richard Fain tells TW+ onboard the 228,081-gt Symphony of the Seas, the world’s largest cruiseship.

“In the end, you can set up a certain amount of rules and regulations and processes, but it really depends on our people to make it happen.”