A set of 6 stamps to promote the potential of sustainable sources of power and/or raise awareness of the problems with our current sources.
Based on in-depth research the response focussed on the size of the stamp, using it as a physical metaphor for the potential. Meaning the 'oil' stamp took the smallest value, and consequently the smallest size, with the 'geothermal' stamp the largest, and first class. The illustration was drawn as a continuous scene to strengthen the series in an attempt to describe the sources in a subtle, eye-catching way.
