A German TV show singled out a cruiseship owned by Carnival subsidiary AIDA Cruises for discharging high levels of particulates. This comes amid increasing scrutiny of shipping emissions, particularly for the cruise industry, in Europe.

"Plusminus," which is carried on German public broadcaster ARD, says that onboard tests its producers conducted during a seven-day cruise aboard the 3,286-berth AIDAPrima (built 2016) showed particulate emissions running above similar measurements taken at street level in major German cities.

A test done on the ship's ice skating rink, located right behind the smokestack, showed emissions that the show's producers called three to four times the level seen on major city streets.

In a statement to Plusminus, AIDA says the measurements made "do not take place according to scientific standards and methods" and "do not constitute a viable basis" for the show's allegations. A representative of AIDA was unable to comment by presstime.

The Plusminus show came about a month after a French TV show performed a similar test on an unidentified European cruiseship.