The cruise ship industry comes in for heavy criticism for its poor environmental record. Environmental groups accuse the sector of polluting the seas, with luxury liners disposing of their waste in the ocean and emitting huge amounts of CO2.
According to the World Wide Fund for Nature, cruise ships'wastewater disposal practices are creating marine dead zones. But passenger numbers are climbing - last year, 20 million holidaymakers booked a cruise. For more go to http://www.dw.de/global-3000-the-globalization-program-2012-10-29/e-16298534-9798