You cannot warm water with an icecube! They teach that in kindergarten!
But you certainly can warm water with all of that hot air coming out of your mouth. Add a layer of greenhouse gasses to the mix and you trap all of that BS near the earth's surface causing those icecaps to melt and the ensuing climate change.
That reminds me: The next time I'm in Europe I need to make a stop to your backyard and crap in it. Seems you don't mind at all since the earth can handle it.