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What is the main cause of air pollution?a)Planting more treesb)Smoke from factories and vehiclesc)Using renewable energy sourcesd)Recycling waste materialsCorrect answer is option 'B'. Can you explain this answer? for Class 4 2025 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about What is the main cause of air pollution?a)Planting more treesb)Smoke from factories and vehiclesc)Using renewable energy sourcesd)Recycling waste materialsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 4 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the main cause of air pollution?a)Planting more treesb)Smoke from factories and vehiclesc)Using renewable energy sourcesd)Recycling waste materialsCorrect answer is option 'B'. Can you explain this answer?.

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