Ключевые слова: 21, activist, against, art, ban, block, collage, composite, contemporary, decline, deny, design, earth, eco, ecology, ecosystem, environment, garbage, global, globe, hand, ignore, illustration, montage, nature, negative, no, peace, planet, plastic, pollution, prohibition, protection, recycle, refuse, rejection, restriction, reuse, rubbish, save, say, sign, stop, trash, veto, voluntary, volunteer, warning, waste, world,