Respiration is not a manmade cause of global warming.
What is respiration?
- It is a vital process used by living organisms.
- "Respiration is the chemical process by which living organisms obtain energy by taking in oxygen and giving out carbon dioxide."
- This released carbon dioxide are taken up by plants to make food and release oxygen in atmosphere.
What is global warming?
- The rise in earth's average temperature than the normal is called global warming.
- This are due to the effect of greenhouse gases (like CO2, Nitrous oxide, methane and water vapour).
- The increase in greenhouse gases is a result of manmade cause such as burning fossil fuels, deforestation and population growth.
What do you mean by manmade cause?
- "Man-made things are created or caused by people, rather than occurring naturally."
Hence, the correct option is c. respiration.
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