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.
Tipping personnel are the staff with direct contact with the guests who pay them tips. There are specified amounts of tips per particular positions which are advised to guests prior to embarkation and which vary from one cruise line to another. Such personnel are waiters, busboys /assistant waiters, bar waiters/waitresses, bartenders, cocktail waitresses, etc. Tipping personnel have a small base salary.