A sticker attached to a pole with a QR code in the top right corner. Down the left side are the letters A to G on coloured tags with arrow-angled right ends, and under G a black coloured tag with HELL written on it, in the style of the European Union's energy efficiency labels found on appliances. Each tag ranges in colour from dark green to red and increases in size the further down it goes. Each arrow end indicates a different silhouette.
The A tag is dark green and very short, the arrow end points towards the silhouette of a walking stick figure.
The B tag is a slightly lighter green than A and slightly longer, the arrow end points towards the silhouette of a bicycle.
The C tag is light green and slightly longer than B, the arrow end points towards the silhouette of an moped.
The D tag is yellow and slightly longer than C, the arrow end points towards the silhouette of a subway train.
The E tag is orange and slightly longer than D, the arrow end points towards the silhouette of a car.
The F tag is orange-red and slightly longer than E, the arrow end points towards the silhouette of a yacht.
The G tag is red and the length increase from F is almost triple that of previous length increases, the arrow end points towards the silhouette of an airplane.
The HELL tag is black and longer than G, the arrow end points towards the silhouette of a tank.
[I am a human, if I’ve made a mistake please let me know. Please consider providing alt-text for ease of use. Thank you. 💜]
The only subtle detailed you missed, which is not surprise, is that Sweden and Norway (not sure which if the other skandies, maybe this is a EU thing, hm) use those letters, with those colors, and those arrows to indicate energy efficiency rating. So, it could be a nudge at the relationship between reducing emissions or suffer consequences of global warming, which will eventually lead to famine and war.