WWF Canada created a billboard for the campaign ‘Save our Climate‘ (silly Flash site alert!) which uses a really neat and clever way to convey their message about global warming. Most interesting from a tech/geek perspective is the low-tech angle in creating this. They seem to use only the sun and some board cut with an interesting pattern casting a shadow similar to a waves pattern. During the day the shadow resembles a rising tide ‘drowning’ the message. Brilliant idea!

View the commercial here:

[kml_flashembed movie="http://www.youtube.com/v/MLpvnnu66v8" width="425" height="350" wmode="transparent" /]

Thanks to information aesthetics