Ключевые слова: alphabet, background, block, clean, clean air day, climate, concept, conservation, cube, design, earth, eco, eco friendly, ecologic, ecological, ecology, environment, environmental, environmentally, font, global, go green, green, letter, message, natural, nature, planet, plastic, pollution, protect, protection, recycle, recycling, reduce, responsibility, reuse, save, save earth, save world, savings, space, symbol, text, wood, word, world, world climate change day, world environment day, zero waste,