A close-up of an official environmental protection agency metal warning sign marking the Tar Creek Superfund site, with the toxic rust-orange stream visible flowing behind it. Bright daylight, high contrast between yellow/blue sign and vibrant orange water.. Context markers: contemporary EPA warning sign, federal superfund designation, orange acid mine drainage water. The complete visual composition—including all primary subjects, secondary supporting elements, boundaries, and environmental contours—must sit comfortably inside the canvas with generous clean white negative space visible on all four sides (target 8-12% margins, minimum 6%). The entire visual assembly must occupy maximum 80% canvas height and 84% canvas width. Nothing touches or crosses any canvas edge. Do not crop the primary subject. Clean isolated 2D explainer composition against pure white/off-white background. hand-drawn 2D explainer cartoon illustration, confident clean black outlines, flat cel-style colors, simplified readable forms, soft minimal shading, clear focal hierarchy, clean educational YouTube illustration, no photorealism, no 3D rendering, no typography, no text, no watermarks
