Trains and ferry's, on the other hand, are much more likely to cut their emissions even further. Trains are often electric and as the production of electricity becomes greener every year, so does the train. Ferry's have some things to solve, but the ferry I took, the Stena Germanica, took a big step - ThreadSky

marcvanderlee.bsky.social • 155 days ago

Trains and ferry's, on the other hand, are much more likely to cut their emissions even further. Trains are often electric and as the production of electricity becomes greener every year, so does the train. Ferry's have some things to solve, but the ferry I took, the Stena Germanica, took a big step

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marcvanderlee.bsky.social•155 days ago

The ferry sails on recycled methanol, which cuts emissions by up to 25% in terms of CO2 and by up to 99% SOx and 60%NOx (thanks Wikipedia!). I don't expect the airline industry to take such a big step anytime soon, meaning the emisssion gap is likely to increase in the coming years.

marcvanderlee.bsky.social•155 days ago

But what makes a ferry so green? And why is a cruise ship so polluting, then? There are several reasons, but the most important one is because of what they carry.

A cruise ship carries mainly people it carries a lot of them, but also emits a lot. The emissions per passenger are still high.

marcvanderlee.bsky.social•155 days ago

What about a ferry? Funnily enough, the emissions per passenger aren't much lower on a ferry, sometimes even higher. But why does it score to well on a graph that wlI just showed? That is because a ferry often has a big focus on transporting vehicles and their load.

marcvanderlee.bsky.social•155 days ago

And so, focussing on the emssions per passenger is a bit unfair. The emissions per passenger on a mega container ship, that transports millions of kg of goods but only has a few crew members, are also extremely high. But does it make the container ship very polluting? Not neccessarily.

marcvanderlee.bsky.social•155 days ago

The same goes on a ferry. Without it, the cars and trucks would have had to drive the distance, usually having to make a big detour (clearly the case for Göteborg - Kiel), resulting in a lot of emissions. The ferry takes these emissions from the road.

marcvanderlee.bsky.social•155 days ago

While the ferry itself clearly emits some CO2, this is still much lower than from all the vehicles combined, were they to drive. And the extra foot passenger? Sure, they emit some due to consumption on board. But the impact is low. Thus, emissions for a foot passenger are also low.

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