Ключевые слова: background, blue, climate, cloud, concept, crack, danger, dead, desert, dry, earth, ecology, energy, environment, environmental, field, forest, future, global, globe, heat, hope, hot, landscape, light, mountains, natural, nature, ozone, planet, pollution, ray, recycle, save, season, sky, summer, sun, sunlight, surface, texture, tree, warming, weather,