(via Airminded · Don’t waste coal and other exhortations!)
This one is from Germany and aims to persuade people to obey the black regulations as ‘Light means your death!’ Oddly, the four-engined bomber silhouetted against the night sky has stars in its roundels. So it’s either American — who very rarely did strategic bombing at night — or Soviet — who very rarely did strategic bombing. Why either of those would be chosen over the British, who were routinely called ‘night pirates’ and the like by Nazi propagandists, is hard to explain.
A poster for the next Earth Day