Ключевые слова: abstract, active, atom, atomic, backdrop, background, blue, caution, chemical, chemistry, danger, dangerous, dark, design, dirty, emblem, energy, environment, fallout, forbidden, green, grime, grimy, grunge, grungy, hazard, hazardous, illustration, industrial, irradiation, material, navy, nuclear, physical, physics, pollution, radiation, radiation injury, radiation warning symbol, radioactive, radioactive contamination, radioactivity, raster, risk, rough, science, scratch, scratched, sign, surface, symbol, texture, textured, toxic, trefoil, wall, warn, warning, waste, yellow award,