Golfmann,
Nice souvenir sheet.
Probably the lightning is representing the electricity (in it's raw form) the wind turbine generates. We are starting to have these windmills (well, they are not milling anything so I guess wind turbine is a better description, but I like Windmills!

)
Here is the Canada souvenir sheet for Spring 2009 Polar Regions, and because it is divided horizontally down the middle, one can use half of it to post a letter as the next picture shows.
I thought it was a neat penguin stamp until I looked closer! I know, Canada doesn't have penguins, but they are really cute. We paid them a lot of good good fishes to have them model and be on a Canada S/S.


The poor polar bear looks like we are drowning him. Why, he asks? Why? So sad. The fox is really nice.

