Climate Change and Global Warming Questions and Answers

Q: India targets for Net Zero by :

India's net zero target year is 2070.The Prime Minister announced the target at COP26 in Glasgow in November 2021 as part of the 'Panchamrit' commitments, and India's long-term low-emission development strategy submitted to the UNFCCC in 2022 confirms net zero emissions by 2070.2050 is the target of many developed economies, such as the European Union, the UK and Japan. China's target is 2060. 2030 is the year for India's nearer goals, such as 500 GW of non-fossil capacity and a 45% cut in emissions intensity of GDP from 2005 levels. 2045 is not India's target year.

Q: A coalition of Sub-national Governments that aims to achieve greenhouse gases emission mitigation is known as

The coalition is the Under 2 Coalition.The Under2 Coalition is a group of state, provincial and regional governments, for which The Climate Group acts as secretariat, committed to cutting greenhouse gas emissions in line with keeping global warming well under 2 °C. Its members are sub-national, not national, governments.EP100 is a Climate Group initiative of businesses committed to energy productivity. 'Kyoto Coalition' and 'Climate Coalition' are not the name of this sub-national alliance.

Q: Which of the following is a 'Green House' gas ?

The greenhouse gas among these is Methane.A greenhouse gas absorbs the infrared radiation emitted by the Earth's surface and so traps heat. Methane (CH4) does this strongly, much more than carbon dioxide molecule for molecule, and comes from wetlands, paddy fields, livestock and fossil fuel leaks.Nitrogen and oxygen, which make up about 99% of the air, are made of two identical atoms and do not absorb infrared radiation, so they are not greenhouse gases. Fluorine is a highly reactive element, not an atmospheric greenhouse gas; it is the fluorinated compounds such as CFCs that trap heat.

Q: Which layer of gas in the atmosphere protects us from harmful ultra violet rays of the sun ?

The protective layer is ozone.Ozone (O3) is concentrated in the stratosphere, roughly 15 to 35 km above the earth. This ozone layer absorbs most of the sun's harmful ultraviolet radiation, which would otherwise cause skin cancer and cataracts and damage plants and marine life.Nitrogen and oxygen make up most of the air but do not form a shield against ultraviolet rays in this way. Carbon dioxide is a greenhouse gas, which traps outgoing heat (infrared radiation) rather than blocking incoming ultraviolet.

Q: Which of the following gases is responsible, for global warming ?

The gas responsible for global warming is carbon dioxide.Carbon dioxide is a greenhouse gas: it lets sunlight through but absorbs the heat (infrared radiation) given off by the earth's surface, keeping it in the lower atmosphere. Burning coal, oil and gas and clearing forests have raised its concentration sharply since the industrial revolution, and it is the largest single cause of the present warming.Oxygen, nitrogen and hydrogen are made of two identical atoms and do not absorb infrared radiation, so they are not greenhouse gases. Oxygen and nitrogen together make up about 99 percent of dry air without trapping heat.

Q: Montreal Protocol is related to

The Montreal Protocol is related to ozone depletion.The Montreal Protocol on Substances that Deplete the Ozone Layer, adopted in 1987, phases out chlorofluorocarbons, halons and other chemicals that destroy the stratospheric ozone layer. Its Kigali Amendment of 2016 extends it to hydrofluorocarbons.Nuclear weapons are covered by treaties such as the NPT, and landmines by the Ottawa Treaty of 1997. Since ozone is correct, 'None of these' fails.

Q: The term "carbon footprint" refers to

A carbon footprint is the total greenhouse gas emissions caused by a person, organisation, product or activity.It adds up all the greenhouse gases released directly and indirectly, from burning fuel, using electricity, transport, food and manufacturing, and expresses the total as tonnes of carbon dioxide equivalent.The area covered by forests and the carbon stored in soil are measures of carbon sinks, the opposite side of the account. The carbon content of a fuel is a property of the fuel, not of the emissions someone is responsible for.

Q: Paris Agreement is on

The Paris Agreement is on climate change.Adopted in December 2015 at COP21 of the UN Framework Convention on Climate Change, the Paris Agreement commits countries to hold global warming well below 2°C above pre-industrial levels and to pursue efforts to limit it to 1.5°C, through nationally determined contributions.It has nothing to do with disarmament, economic recovery or reform of the United Nations.

71.

India targets for Net Zero by :

A.2045
B.2070
C.2050
D.2030

Exam Year(s)

MH SET - 2025, SET Exam - 2025,

Answer: B

India's net zero target year is 2070.

The Prime Minister announced the target at COP26 in Glasgow in November 2021 as part of the 'Panchamrit' commitments, and India's long-term low-emission development strategy submitted to the UNFCCC in 2022 confirms net zero emissions by 2070.

2050 is the target of many developed economies, such as the European Union, the UK and Japan. China's target is 2060. 2030 is the year for India's nearer goals, such as 500 GW of non-fossil capacity and a 45% cut in emissions intensity of GDP from 2005 levels. 2045 is not India's target year.

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72.

Find the elements of India's climate action :

(i) Net-Zero Emissions by 2070
(ii) Increase Non-Fossil Energy Capacity and Renewable energy share
(iii) Planting trees and stopping deforestation
(iv) Reduce Carbon Intensity and Carbon Emissions

A.(i) and (ii) only
B.(ii), (iii) and (iv) only
C.(i), (iii) and (iv) only
D.(i), (ii) and (iv) only

Exam Year(s)

TNPSC Group 1 - 2025, TNPSC - 2025,

Answer: D

The key marks (i), (ii) and (iv) as elements of India's climate action: net-zero emissions by 2070, more non-fossil energy capacity and renewable share, and a lower carbon intensity and emissions.

Planting trees and stopping deforestation (iii) is part of India's carbon-sink goal in general terms, but it is not accepted among the elements in the key, so the options containing (iii) are rejected.

India announced at COP26 in Glasgow in 2021 that it would reach net-zero emissions by 2070 and meet half its energy needs from renewables by 2030.

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73.

Due to Global warming the following ______ are badly affected.

(i) Agriculture and Environment
(ii) Agriculture and Industry
(iii) Agriculture, Horticulture and Environment
(iv) Industry

A.(i) and (ii)
B.(i) and (iii)
C.(iii) alone
D.(i) and (iv)

Exam Year(s)

TNPSC Group 1 - 2025, TNPSC - 2025,

Answer: C

The key marks (iii) alone: global warming badly affects agriculture, horticulture and the environment together, so the statement that names all three is chosen.

Statements (i), (ii) and (iv) each name only part of the sectors affected, so the options built from them are incomplete.

Rising temperatures change rainfall and crop seasons, so farm and garden crops suffer first, and the environment suffers through melting ice and rising seas.

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74.

A coalition of Sub-national Governments that aims to achieve greenhouse gases emission mitigation is known as

A.EP100 Coalition
B.Under 2 Coalition
C.Kyoto Coalition
D.Climate Coalition

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: B

The coalition is the Under 2 Coalition.

The Under2 Coalition is a group of state, provincial and regional governments, for which The Climate Group acts as secretariat, committed to cutting greenhouse gas emissions in line with keeping global warming well under 2 °C. Its members are sub-national, not national, governments.

EP100 is a Climate Group initiative of businesses committed to energy productivity. 'Kyoto Coalition' and 'Climate Coalition' are not the name of this sub-national alliance.

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75.

Which of the following is a 'Green House' gas ?

A.Methane
B.Fluorine
C.Nitrogen
D.Oxygen

Exam Year(s)

Tripura Public Service Commission - 2014,

Answer: A

The greenhouse gas among these is Methane.

A greenhouse gas absorbs the infrared radiation emitted by the Earth's surface and so traps heat. Methane (CH₄) does this strongly, much more than carbon dioxide molecule for molecule, and comes from wetlands, paddy fields, livestock and fossil fuel leaks.

Nitrogen and oxygen, which make up about 99% of the air, are made of two identical atoms and do not absorb infrared radiation, so they are not greenhouse gases. Fluorine is a highly reactive element, not an atmospheric greenhouse gas; it is the fluorinated compounds such as CFCs that trap heat.

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76.

Which layer of gas in the atmosphere protects us from harmful ultra violet rays of the sun ?

A.Oxygen
B.Carbon dioxide
C.Nitrogen
D.Ozone

Exam Year(s)

Tripura Public Service Commission - 2015,

Answer: D

The protective layer is ozone.

Ozone (O₃) is concentrated in the stratosphere, roughly 15 to 35 km above the earth. This ozone layer absorbs most of the sun's harmful ultraviolet radiation, which would otherwise cause skin cancer and cataracts and damage plants and marine life.

Nitrogen and oxygen make up most of the air but do not form a shield against ultraviolet rays in this way. Carbon dioxide is a greenhouse gas, which traps outgoing heat (infrared radiation) rather than blocking incoming ultraviolet.

Discuss in Forum

77.

Which of the following gases is responsible, for global warming ?

A.Oxygen
B.Hydrogen
C.Nitrogen
D.Carbon dioxide

Exam Year(s)

Tripura Public Service Commission - 2015,

Answer: D

The gas responsible for global warming is carbon dioxide.

Carbon dioxide is a greenhouse gas: it lets sunlight through but absorbs the heat (infrared radiation) given off by the earth's surface, keeping it in the lower atmosphere. Burning coal, oil and gas and clearing forests have raised its concentration sharply since the industrial revolution, and it is the largest single cause of the present warming.

Oxygen, nitrogen and hydrogen are made of two identical atoms and do not absorb infrared radiation, so they are not greenhouse gases. Oxygen and nitrogen together make up about 99 percent of dry air without trapping heat.

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78.

Montreal Protocol is related to

A.Ozone depletion
B.Nuclear weapons
C.Landmines
D.None of these

Exam Year(s)

Tripura Public Service Commission - 2019,

Answer: A

The Montreal Protocol is related to ozone depletion.

The Montreal Protocol on Substances that Deplete the Ozone Layer, adopted in 1987, phases out chlorofluorocarbons, halons and other chemicals that destroy the stratospheric ozone layer. Its Kigali Amendment of 2016 extends it to hydrofluorocarbons.

Nuclear weapons are covered by treaties such as the NPT, and landmines by the Ottawa Treaty of 1997. Since ozone is correct, 'None of these' fails.

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79.

The term "carbon footprint" refers to

A.Area covered by forests
B.Amount of carbon stored in soil
C.Total greenhouse gas emissions
D.Carbon content in fuels

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: C

A carbon footprint is the total greenhouse gas emissions caused by a person, organisation, product or activity.

It adds up all the greenhouse gases released directly and indirectly, from burning fuel, using electricity, transport, food and manufacturing, and expresses the total as tonnes of carbon dioxide equivalent.

The area covered by forests and the carbon stored in soil are measures of carbon sinks, the opposite side of the account. The carbon content of a fuel is a property of the fuel, not of the emissions someone is responsible for.

Discuss in Forum

80.

Paris Agreement is on

A.Disarmament
B.Economic Resurgence
C.Reform of UN
D.Climate change

Exam Year(s)

Tripura Public Service Commission - 2021,

Answer: D

The Paris Agreement is on climate change.

Adopted in December 2015 at COP21 of the UN Framework Convention on Climate Change, the Paris Agreement commits countries to hold global warming well below 2°C above pre-industrial levels and to pursue efforts to limit it to 1.5°C, through nationally determined contributions.

It has nothing to do with disarmament, economic recovery or reform of the United Nations.

Discuss in Forum

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