Over on the howtoons blog, Saul Griffith writes:
I really like the way this advertisement demonstrates how the energy we use, when produced by fossil fuels, leads to Carbon Dioxide emissions. Carbon Dioxide is normally invisible which is why we have no real sense of how much is produced by using a blender or washing machine. But if it’s in black balloons, you can really imagine it!. We best start using solar and wind power as soon as possible.