Six countries produce nearly 60 percent of global carbon dioxide emissions. China and the United States combine for more than two-fifths. The planet's future will be shaped by what these top carbon polluters do about the heat-trapping gases blamed for global warming. How they rank, what they're doing:
Viking River Cruises Tipping Policy. It is customary to give cruise gratuities, subject to your satisfaction of services rendered. Gratuities on board and on land are not included in your full fare.
Designed to cruise the worldâs great rivers, all Viking ships are built, above all, for comfort. On every Viking ship, your experience will include all onboard meals, complimentary wine, beer and soft drinks with onboard lunch and dinner service, guided tours and more.