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.
MSC Cruises: MSC charges different gratuity rates based on the voyage length and destination, but a typical Caribbean cruise carries a $12 per person per day fee for tips (half that amount for children under 18).Norwegian Cruise Line: $12 per person per day.indstar Cruises: $12 per person per day. How Much to Tip When Going A La Carte. If you do prefer tipping on a case-by-case basis, you can use these guidelines for how much to offer each member of the crew: Cabin Steward/ess: $4 to $5 per night, depending on service.