The rulings underscore growing pressure on travel marketers to back up climate claims. LNG may reduce certain pollutants compared with heavy fuel oil, but it doesn’t make a cruise “green” on its own.

European culture is coming aboard Celebrity Xcel’s Mediterranean cruises this summer through four new festival experiences.

Celebrity Cruises has long positioned itself at the intersection of modern luxury and cultural immersion, but its newest ship, Celebrity Xcel, takes that philosophy several steps further. As the ...