Ключевые слова: abstract, adventure, agriculture, air, altitude, atmosphere, autumn, background, backpacking, balloon, beautiful, blue, calm, camping, carbon, change, chemical, clear, climate, clouds, co2, color, concept, conservation, contamination, copy, damage, danger, design, destruction, dioxide, distant, ecology, emission, emissions, energy, environment, environmental, flora, forest, freedom, fresh, gas, global, green, hiking, hobby, holiday, industry, inscription, journey, landscape, lifestyle, mitigation, mountain, mountains, nature, outdoors, ozone, picturesque, pollution, postcard, range, recreation, reduction, relaxing, scenery, season, sky, slopes, smog, space, summit, text, tourism, travel, traveling, trees, trip, vacation, wanderlust, weekend, wilderness, woods,