I bet a Greece's numbers don't include all the Cruise Ships from foreign countries that sail around the Greek islands and spew smoke 24/7...
When I was there earlier this year (in the off season no less), there would be 3-4 massive ships sitting in the port at any given moment.
It's weird that we, as people, think that our being or self ends at our skin. And we're just a consciousness controlling a meat cube.
What about all the bacteria living on and inside of us? People would die without their microflora.
What about our subconscious/unconscious doings/thoughts? Are we in control of them? Or are they in control of us? Could consciousness be an illusion? One created by our senses' interpretation of external stimuli.