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:
River cruise companies also have their own tipping policies. A handful, such as Scenic Tours, Avalon Waterways and Tauck, include gratuities in their overall price, while Viking River Cruises recommends that guests tip at the end of the trip at a rate of between Â£5 and Â£10 a day.
Cruises Find a Cruise. Baltic & Northern Europe. Viking Homelands Stockholm to Bergen 15 Days - From $5,199. Into the Midnight Sun Bergen to London 15 Days - From $6,449. Trade Routes of the Middle Ages Bergen to Barcelona 15 Days - From $3,999. In the Wake of the Vikings Bergen to Montreal 15 Days - From $5,749.