I read that a single cargo ship pollutes more than the entire car park of many countries(!), and so I figured, it's just common sense to support autonomous sail

I read that a single cargo ship pollutes more than the entire car park of many countries(!), and so I figured, it's just common sense to support autonomous sail ships. I don't know how much pollution we could save, but I'm guessing between thousands to millions of tons each year. I think this will work, because not all cargo is time-intensive as long as there's good logistics behind it. And I think autonomous sail ships could really make a difference here. I really want to get into this. Can someone help me? :)