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प्रश्न
State three ways by which carbon dioxide gas is added into the atmosphere.
उत्तर
- By respiration of living organisms.
- By combustion of fuels.
- By decay of dead animals, plants and plants products.
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संबंधित प्रश्न
Choose the correct alternative
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Tick the most appropriate answer.
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a. sulphur
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c. oxygen
d. none of these
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