Those considering taking a cruise in the new year should choose carefully – in a single trip each ship operated by top German firms Aida Cruises and Tui Cruises creates as much pollution as five mil Those considering taking a cruise in the new year should choose carefully – in a single trip each ship operated by top German firms Aida Cruises and Tui Cruises creates as much pollution as five million cars, says environmental group Nabu. “They are the spearhead of the generally lucrative German cruise ship industry. They decorate their ships with great slogans such as wellness, airstream and sea air – but enormous levels of poisonous pollutants come from the chimneys of their luxury liners,” said Olaf Tschimpke, president of Nabu, the Nature and Biodiversity Conservation Union.