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.
The non-tipping personnel on cruise ships are those who serve the crew, i.e. the lower positions in the passenger area - Staff Waiter/Waitress, Snack Steward, etc. They have fixed salaries without tips and their earnings are from USD 350 to USD 500 per week.