Probable Question answer form greenhouse effect: School Level examination:

Greenhouse Effect:

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Greenhouse Effects :

Details of Greenhouse effect and Question answer:

The greenhouse effect is a natural process by which certain gases in Earth's atmosphere trap heat, keeping the planet warm enough to support life. When sunlight reaches Earth, some of it is absorbed by the surface, warming it. The Earth then emits this energy as infrared radiation (heat). Greenhouse gases, such as carbon dioxide (CO₂), methane (CH₄), and water vapour, absorb and re-emit this heat, preventing it from escaping into space.

This trapped heat helps maintain Earth’s average temperature at around 15°C, which is essential for sustaining life. Without the greenhouse effect, the Earth's surface would be much colder, making it uninhabitable.

However, human activities, such as burning fossil fuels and deforestation, have increased the concentration of greenhouse gases, enhancing this effect. This leads to global warming, which is a rise in Earth's average temperature, contributing to climate change and other environmental problems.

Some Important Questions from Greenhouse Effect:

1. What is the Greenhouse Effect?

=> The greenhouse effect is a natural phenomenon where certain gases in Earth's atmosphere trap heat, preventing it from escaping into space, thus keeping the Earth warm enough to support life. These gases include carbon dioxide (CO₂), methane (CH₄), water vapor (H₂O), and nitrous oxide (N₂O).

2. What are the main greenhouse gases?

=> The primary greenhouse gases are:
Carbon dioxide (CO₂)
Methane (CH₄)
Water vapor (H₂O)
Nitrous oxide (N₂O)
Ozone (O₃) These gases are responsible for trapping heat in the atmosphere, contributing to the greenhouse effect.

3. How do greenhouse gases contribute to global warming?

=> Greenhouse gases absorb infrared radiation emitted by the Earth's surface. They re-radiate this heat back towards Earth, leading to an increase in global temperatures. Human activities, such as burning fossil fuels and deforestation, have raised the levels of these gases, intensifying the greenhouse effect and causing global warming.

4. What are the sources of greenhouse gases?

=>Source of Greenhouse Gases:

Natural sources: Volcanic eruptions, respiration, and decomposition of organic matter.
Human-induced sources: Industrial activities (burning fossil fuels like coal, oil, and gas), deforestation, and agricultural practices (rice cultivation, livestock raising).

5. What are the effects of the enhanced greenhouse effect?

=> The enhanced greenhouse effect leads to global warming, which has several consequences:

Rising sea levels due to melting polar ice.
Extreme weather events like heatwaves, floods, and droughts.
Disruption of ecosystems and loss of biodiversity.
Impact on agriculture due to changing rainfall patterns.
Health issues due to rising temperatures and air pollution.

6. What is the difference between the natural greenhouse effect and the enhanced greenhouse effect?

=> The natural greenhouse effect is essential for maintaining Earth’s temperature, making the planet habitable. The enhanced greenhouse effect refers to the additional warming caused by increased levels of greenhouse gases due to human activities. This leads to global warming and climate change.

7. What are the methods to reduce greenhouse gas emissions?

=> Methods to reduce greenhouse gas emissions:

Switch to renewable energy: Using solar, wind, and hydropower instead of fossil fuels.
Energy efficiency: Implementing energy-saving technologies and practices.
Reforestation: Planting trees to absorb CO₂ from the atmosphere.
Promoting sustainable agriculture: Reducing emissions from livestock and rice farming.

8. How does the Greenhouse Effect impact Nepal?

=> Nepal is particularly vulnerable to the effects of the enhanced greenhouse effect due to its geography:

Glacial melting in the Himalayas threatens water resources and can cause floods.
Shifts in monsoon patterns may impact agriculture, which is the backbone of Nepal’s economy.

Increased risk of natural disasters such as landslides, floods, and droughts.

Health issues problems may also occurs due to the climate change .

9. What is the role of international agreements like the Paris Agreement in addressing climate change?

=> The Paris Agreement is an international treaty aimed at reducing global greenhouse gas emissions to limit the rise in global temperatures to below 2°C above pre-industrial levels. Nepal is a signatory to the agreement and has committed to reducing its emissions through sustainable development and increasing the use of renewable energy sources.

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