Ключевые слова: backboard, background, black, blank slate, blank slate stone, blank stone, crude, dark, darkened, ecology, geology, grey, gross, insert, label, layout, local, marking, material, mineral, natural, nature, organic, panel, placard, promo, promotion, raw, rectangle, recyclable, rock, sign, signboard, slate stone, slates, sticker, stone, stones, sustainable development, tag, texture, tile, unrefined, white background,