Ключевые слова: advise, advisory, alarm, alert, announce, caution, clean, clipart, command, constraint, counsel, curb, danger, dangerous, dirty, dumping, forbid, foreboding, forewarning, garbage, going green, harm, illegal, illustrate, illustration, info, informative, kills, limitation, no, placard, pollute, pollution, post, prohibition, recommend, recommendation, red, restrict, restriction, rule, sign, signal, stop, symbol, tell, trash, violators will be prosecuted, warning,