Many plants and factories pollute the air, causing serious pollution problems in cities., , Global warming happens when people cut down forests and destroy the natural environment., , Scientists warn that if temperatures rise too much, it will be hard to protect the environment., , The greenhouse effect is making the climate warmer and leading to more acid rain., , Some rivers are polluted by waste from plants and factories, which destroy fish and animals., , Environmental protection is very important if we want to keep the environment clean and safe., , Because of climate change and pollution, we must work harder to save nature and stop global warming., .

Environment

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