text:  Yes, heavy fuel oil is the cheapest option out there. And unfortunately, that's why it's so difficult to get ships to move to alternatives. But there are already a lot of ships using cleaner, lighter fuels, using diesel. And I find it unbelievable in this day and age that we're calling diesel a cleaner fuel. But in shipping terms, it is. So what we want to see is all the ships in the Arctic move to diesel or distillate fuels. These are cleaner. They don't produce so much black carbon. They are easier to clean up.