Ключевые слова: background, book, booklet, branch, brochure, brown, close, concept, describe, draw, drawing, eco, ecology, education, environment, environmental, environmentally, equipment, friendly, grass, green, idea, leaf, macro, memory, natural, nature, note, notebook, object, paper, pen, pencil, plot, pollution, school, sketch, stick, student, texture, think, trace, tree, up, white, wood, wooden, write,