> Does it take into account the additional co2 that fishing boats emit? Esp. given that they usually use far more harmful fuels than the gas used on roads. Tho

> Does it take into account the additional co2 that fishing boats emit? Esp. given that they usually use far more harmful fuels than the gas used on roads. Those more harmful fuels don't produce extra CO₂, though. Marine diesel engines burn less clean oils, and thus produce other pollutants (such as sulfur dioxide, nitrogen oxide, particulate emission), but the energy content and CO₂ emissions are same as with e.g. gasoline.