Which gas is required for breathing?, Nitrogen, Carbon dioxide, Oxygen, Hydrogen, Which gas helps plants grow?, Oxygen, Nitrogen, Carbon dioxide, Helium, Why is air important for survival?, It provides light, It contains oxygen and nitrogen, It makes food, It prevents rainfall, Acid rain can cause which of the following?, Water pollution, Destruction of aquatic organisms, Damage to soil, All of the above, Which of the following is NOT a disease caused by air pollution?, Asthma, Lung cancer, Severe headache, Diabetes, Which of these is a direct health effect of air pollution?, Cough and catarrh, Stronger immunity, Faster growth of plants, Better eyesight

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