Image courtesy Hennepin County Library in MinneapolisEliminating waste. Walking instead of driving. Taking “Staycations” instead of flying. Fixing things instead of buying new. Car-pooling. All these things environmentalists talk about were considered a necessity 70 years ago during World War II. Where today we see websites and public service announcements, then they did posters — sometimes funny, sometimes a bit over the top, and sometimes graphically quite beautiful.