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 Age. The Viking Age was a period in Northern European and Scandinavian history from the eighth to eleventh centuries. Scandinavian Vikings, also called Norsemen, explored the oceans and rivers of Europe through trade and warfare. The Vikings also reached Iceland, Greenland, Newfoundland, and Anatolia.