Well, the ocean DID kill them. But that fact alone has no policy implications if those 3 jackasses were always going to set sail in a boat full of holes and there were always going to be an ocean for them to sail on in any scenario.
However, let's say the boat was watertight but not barely seaworthy. In normal oceans the jackasses would survive, but in ACC the ocean gets stormier and the jackasses drown. Now that they drowned in ACC ocean has policy implications. They are casualties of ACC.
As to why it is reasonable to expect a thorough counting of all casualties to be expected from major world wide climate change to run into the millions, the answer is casualty ultimately traceable to even regional, relatively minor climate fluctuation has already ran into the millions several times last century. Take for example the 1984 Ethiopian famine. At least half million died.
However, let's say the boat was watertight but not barely seaworthy. In normal oceans the jackasses would survive, but in ACC the ocean gets stormier and the jackasses drown. Now that they drowned in ACC ocean has policy implications. They are casualties of ACC.
As to why it is reasonable to expect a thorough counting of all casualties to be expected from major world wide climate change to run into the millions, the answer is casualty ultimately traceable to even regional, relatively minor climate fluctuation has already ran into the millions several times last century. Take for example the 1984 Ethiopian famine. At least half million died.