Which of the following statements is/are correct about Greenhouse gases effect?

i. Nitrous oxide is a greenhouse gas.

ii. Carbon dioxide is a greenhouse gas.

iii. Methane is a greenhouse gas.

The correct answer is All the statements i, ii, and iii.

Key Points

• Nitrous oxide (N₂O) is a potent greenhouse gas with a global warming potential much higher than carbon dioxide.
• Carbon dioxide (CO₂) is one of the primary greenhouse gases responsible for global warming. It is released through activities like burning fossil fuels and deforestation.
• Methane (CH₄) is another major greenhouse gas, primarily released through agriculture (e.g., livestock digestion), landfills, and the production of oil and gas.
• All three gases—Nitrous oxide, Carbon dioxide, and Methane—contribute significantly to the greenhouse effect, which leads to global warming and climate change.

Important Points

• The greenhouse effect is a natural process that warms the Earth's surface. However, human activities have amplified the effect, leading to climate change.
• Greenhouse gases trap heat in the atmosphere, making the Earth warmer than it would be without them.
• The primary sources of these greenhouse gases are industrial activities, energy production, agriculture, and deforestation.
• Global initiatives like the Paris Agreement aim to reduce greenhouse gas emissions and combat climate change.

Additional Information

• Option 1: "Only the statement ii" is incorrect because both Nitrous oxide and Methane, in addition to Carbon dioxide, are greenhouse gases.
• Option 2: "Statements i and ii only" is incorrect because it excludes Methane, which is also a greenhouse gas.
• Option 3: "Statements ii and iii only" is incorrect because it excludes Nitrous oxide, another significant greenhouse gas.
• Option 4: "All the statements i, ii, and iii" is correct as all three gases mentioned are greenhouse gases contributing to the greenhouse effect.