minimalist ecological protection poster, trilogy part 3, centered black industrial factory chimneys at the bottom of the frame, thick dark smoke plumes rise upward and erode the pale gray sky, natural white clouds inside the smoke are dissolving and fading away, a single bright red atmospheric circulation line is cut off by the industrial smoke, large negative space above, flat graphic design, clean edges, black dark gray off-white and red palette, consistent visual style with the series, strong symbolic meaning of atmospheric pollution, professional poster, no realistic texture, no extra details