cần sự phối hợp chặt chẽ

**Prompt 1: A stark contrast between a serene, vibrant Vietnamese river of the past and a heavily polluted one in the present.**
    *   **Image Description:** On one side, children happily playing and swimming in a crystal-clear Vietnamese river, with lush green banks, traditional wooden boats, and abundant fish jumping, under a bright, sunny sky. On the other side, the same river, now murky and dark, filled with floating trash and dead fish, flanked by grey, encroaching urban structures and emitting a visible foul odor under a somber sky, highlighting the impact of pollution and urbanization.
    *   **Keywords:** Vietnamese river, past vs. present, clear water, polluted water, children playing, dead fish, lush banks, urban sprawl, traditional boat, garbage, environmental degradation, vivid contrast, realism.

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