"Is Your Trip Necessary?": Oil spill image inspired by WWII-era posters

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J.P. Townley sent me this image, which he based on World War II-era posters reminding people on the home front to conserve fuel for the war effort. At his website you can download a PDF of the modern version and see the historic piece that inspired it.

Now, all we need is a "When you ride alone, you ride with Tony Hayward!" poster.