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.
When planning your cruise, check with your travel agent or the cruise line about the tipping policy. Often the recommended tips, which run from about $10 to $20 per passenger per day, are published either in the cruise brochure or on the cruise line Web page. The cruise director will also remind passengers about how much and whom the cruise line recommends you tip.