Ключевые слова: adventure, air, atmospheric, awareness, backpack, beauty, campaign, chemicals, city, colors, contemplation, contrast, ecological, environment, environmental, exploration, factory, freedom, fumes, future, girl, health, hilltop, horizon, impact, industrial, industry, issues, landscape, lifestyle, natural, nature, observer, outdoor, pollution, quality, scenery, scenic, sky, skyline, smoke, smokestacks, social, solitude, sunset, technology, travel, trees, urban, view, woman,