Ключевые слова: air pollution, architecture, building, civil war farm, cloud, cloudy sky, codori farm, crepuscular rays, forest fire smoke, gettysburg, gettysburg battlefield, grasslands, hallowed ground, high water mark, land lot, monument, monument to the 82nd new york infantry, nature, outdoors, pennsylvania, plant, sky, split rail fence, stone monument, tree, united states, wildfire smoke,