would be fantastic if this action spreads all around the country as it's a superb way of forcing jo public to recognise the connection between her/his actions and climate change.

very clever but we have leads now thanks to the shadow presented in the picture ;O)

Very clever and colourful approach but I wonder will it make sense to the portion of the public(probably the majority) not already familiar with the concept of a carbon footprint? If campaign is to continue it seems there should be some further explanation of what the footprints represent. Although mystery is intriguing, of course....