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.
PUBLISHED. Off Norway, a replica of a Viking ship sets sail for Canada in 1991. Photograph from Robert Harding Picture Library, Alamy Five hundred years before Columbus sailed the ocean blue, a Native American woman may have voyaged to Europe with Vikings, according to a provocative new DNA study.ive hundred years before Columbus sailed the ocean blue, a Native American woman may have voyaged to Europe with Vikings, according to a provocative new DNA study.