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Pioneering wind-powered cargo ship sets sail
(www.bbc.com)
This is a most excellent place for technology news and articles.
You should re-read what you responded to. They said that sea shipping is already less polluting than other methods.
Yes, if you tried to scale them up to meet ship capacities, but even the idea of that is ludicrous. Container ships are one of the largest polluters that exist, hopefully this technology can reign that in. Their argument sounds like whataboutism to me.
Do you read anything at all before you respond to it?