carnival cruiselines

The brand problem:
Carnival Cruise lines, the travel brand you probably find Synonymous with fun & family, wants its travelers to have more than just a good time. Carnival wants its travelers to experience world cultures, be sustainable citizens and give back to the planet. Carnival has a small footprint of destination stewardship and sustainable travel. But let's face it: CRUISE LINES HAVEN'T ALWAYS BEEN KNOWN FOR BEING SUSTAINABLE OR ENVIRONMENTALLY FRIENDLY. SO HOW DOES CARNIVAL PUSH THE BOUNDARIES OF SUSTAINABLE TRAVEL, PROMOTE ITS GOOD WILL AND EXPAND ITS SAILINGS TO EUROPEAN PORTS?

my challenge:
Promoting the well-known travel brand's growing sustainable destination stewardship.