The world’s first close-to-zero-emissions ferry, French company La Méridionale’s Piana, launched in Marseille last week, Euronews reports. The ferry’s engines have been equipped with particle filters that cut air pollution, capturing 99% of sulfur oxides and eliminating 99.9% of fine and ultrafine particles — the most dangerous for human health — in what’s being hailed as a first for maritime transport, according to French news station RFI. It reduces emissions to “practically zero,” Euronews adds. La Méridionale runs passenger and freight lines from Marseille to Morocco and Corsica.

The catch? It still creates lots of waste and it’s expensive: Though no emissions are being pumped into the atmosphere, the Piana will still produce tons of waste that will then need to be buried, according to Euronews. Getting her off the ground (or onto the water) was also pricey — costing an estimated EUR 15 mn.