Ключевые слова: blue sky, conifer trees, conifers, environment, evergreen trees, forest, forest canopies, fresh air, greenery, landscape, lowangle perspective, natural environment, natural landscape, natural texture, nature, nature and sky, outdoor nature, outdoors, scenic, sky, sky background, summer, sunrays, tree tops, tree trunks, trees, upward view, vertical trees, wilderness, wood,