The numbers protesting against Symphony of the Seas on Sunday were "disappointing", according to the organisers. | Miquel A. Cañellas

Podemos are calling on the Balearic government to exercise its environmental protection powers by limiting the docking of the most-polluting cruise ships. These powers demand compliance with measures to reduce gas emissions.

With reference to the arrival of Symphony of the Seas on Sunday, the party's parliamentary spokesperson, Alberto Jarabo, yesterday rejected the continuance of "a political agenda of imbalances in a tourism model that is unsustainable".

Jarabo said that a cruise ship emits 3,500 times more sulphur into the atmosphere than car diesel and that pollution by cruise ships affects human health, agriculture and food as well as ecosystems in the Balearics. Noting that some 1.75 million cruise ship passengers are scheduled for Palma this year, Jarabo insisted that it is necessary "to force cruise ships to adopt measures to reduce pollution".

The government should require environmental management certification, he maintained, while the environment ministry should look to use its powers in order to stop the growth of polluting cruise ship tourism. Jarabo recognised that responsibilities for the management of certain ports (such as Palma) lie with the central government. Nevertheless, the regional government should at least attempt to negotiate with Madrid.

Palma mayor Antoni Noguera said yesterday that Palma must "manage success and not die from success". The town hall, he added, is continuing discussions with the Balearic Ports Authority over cruise ship arrivals.