Ключевые слова: branch, canopy, close up, clothes pin, danger, day, energy, flora, green, hanging, hazard, hazardous, leaf, material, message, nature, note paper, nuclear, nuke, outdoor, paper, paper note, radiation, radiation sign, radiation symbol, radiation warning symbol, radioactive, radioactivity, reminder, season, sign, spring, substance, sunny, symbol, text, toxic, tree, twig, warning, waste, word, yellow,