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.
Viking River Cruises, the river cruise division of Viking Cruises, offers scenic cruising along the rivers of Europe, Russia, China, Southeast Asia and Egypt. Since its 1997 inception, the company has grown to a fleet of more than 60 river vessels.