Re: Eco credentials?
"It doesn't really matter were you dump it, as the heat will dissipate"
It does matter, really. If the atmosphere is heated, that heat is dissipated through radiating into space more quickly than if the oceans are heated by the same amount. Water is really good at absorbing and retaining heat, and the oceans have no direct interface to space.
"what matters more is how much heat you generate"
I agree, this does matter more.