Global warming causes sea levels to rise primarily through melting glaciers and:
- Increased rainfall
- Ground subsidence
- Tectonic shifts
- Thermal expansion
Explanation: As ocean water warms, it expands in volume. Thermal expansion accounts for a massive portion of observed sea-level rise.
The legally binding 'Kigali Amendment' focuses heavily on the massive global phasedown of which specific greenhouse gases?
- HFC chemicals
- CFC chemicals
- Carbon dioxide
- Nitrous oxide
Explanation: The Kigali Amendment to the Montreal Protocol aims for the phase-down of hydrofluorocarbons (HFCs), which were introduced to replace CFCs but are potent climate warmers.
India’s 'Panchamrit' strategy, famously announced at the COP26 summit, includes achieving a net-zero emissions target by:
- Year 2080
- Year 2050
- Year 2070
- Year 2060
Explanation: Prime Minister Narendra Modi announced at the 2021 Glasgow COP26 that India aims to achieve net-zero carbon emissions by the year 2070.
Global warming is expected to expand the geographic range of vectors like mosquitoes, drastically increasing tropical diseases like:
- Typhoid fever
- Tuberculosis
- Cholera
- Malaria
Explanation: Warmer temperatures and altered rainfall patterns expand the habitats suitable for Anopheles mosquitoes, increasing the spread of Malaria.
Which prominent international report published in 2006 highlighted the severe macroeconomic impacts of unchecked climate change?
- Dasgupta Review
- Brundtland Report
- IPCC AR4
- Stern Review
Explanation: The Stern Review on the Economics of Climate Change concluded that the benefits of strong, early action on climate change far outweigh the economic costs of inaction.
The primary natural carbon sink that absorbs approximately 25% to 30% of human CO2 emissions is the:
- Amazon rainforest
- Global ocean
- Boreal forest
- Arctic tundra
Explanation: The global ocean acts as a massive carbon sink, absorbing a significant portion of anthropogenic CO2, which unfortunately leads to ocean acidification.
Which global initiative specifically targets the rapid reduction of short-lived climate pollutants like black carbon and methane?
- CCAC alliance
- WMO organization
- UNEP program
- IPCC panel
Explanation: The Climate and Clean Air Coalition (CCAC) is a voluntary partnership aiming to reduce short-lived climate pollutants to protect the environment and public health.
Which international treaty specifically mandated legally binding emission reduction targets for developed nations?
- Vienna Convention
- Paris Agreement
- Montreal Protocol
- Kyoto Protocol
Explanation: Adopted in 1997, the Kyoto Protocol placed binding emission reduction targets heavily on developed nations under the principle of CBDR.
Which highly reactive atmospheric component acts as a natural 'detergent', largely controlling the atmospheric lifetime of methane?
- Carbon monoxide
- Ozone layer
- Hydroxyl radical
- Sulfur dioxide
Explanation: The hydroxyl radical (OH) reacts with methane and other trace gases, breaking them down and effectively cleansing the troposphere.
Which of the following powerful greenhouse gases is produced naturally in large quantities by termites and wetland ecosystems?
- Sulfur dioxide
- Nitrous oxide
- Methane gas
- Carbon dioxide
Explanation: Natural wetlands are the largest natural source of methane, and termites produce it through symbiotic bacteria in their guts during digestion.
The 'Green Climate Fund', designed to assist developing countries in adaptation and mitigation practices, was established during:
- COP 3
- COP 15
- COP 16
- COP 21
Explanation: The Green Climate Fund (GCF) was established at the 2010 United Nations Climate Change Conference (COP 16) in Cancun, Mexico.
Ocean acidification, a direct consequence of rising CO2, specifically reduces the availability of which crucial ion for marine life?
- Calcium ion
- Chloride ion
- Carbonate ion
- Sodium ion
Explanation: As the ocean absorbs CO2, it becomes more acidic, depleting carbonate ions that corals and mollusks need to build their shells.
The Coalition for Disaster Resilient Infrastructure (CDRI) was launched at the 2019 UN Climate Action Summit by which nation?
- France
- India
- Germany
- United States
Explanation: Prime Minister Narendra Modi launched the CDRI to promote the resilience of infrastructure systems to climate and disaster risks globally.
Under the UNFCCC, 'National Adaptation Plans' (NAPs) were established primarily to assist which group of highly vulnerable countries?
- LDCs
- Island states
- Developed nations
- BRICS countries
Explanation: The NAP process was established to help Least Developed Countries (LDCs) identify and address their medium- and long-term adaptation needs.
The term 'Blue Carbon' refers specifically to carbon sequestered and stored by which highly efficient ecosystems?
- High alpine tundras
- Huge boreal forests
- Coastal marine ecosystems
- Vast peatland bogs
Explanation: Blue carbon is the carbon stored in coastal and marine ecosystems, specifically mangroves, tidal marshes, and seagrass meadows.
Which specific agricultural practice is a major global anthropogenic source of methane emissions?
- Wheat farming
- Cotton farming
- Rice cultivation
- Apple orchards
Explanation: Flooded rice paddies create anaerobic conditions in the soil, which are ideal for methanogenic bacteria that produce methane.
The concept of 'Net Zero' emissions dictates that any human-caused greenhouse gas emissions must be perfectly balanced by:
- Total elimination
- Economic growth
- Carbon removals
- Renewable energy
Explanation: Net Zero means cutting greenhouse gas emissions to as close to zero as possible, with any remaining emissions re-absorbed from the atmosphere (carbon removals).
The fundamental concept of the 'Greenhouse Effect' was first discovered and proposed mathematically in 1824 by:
- Albert Einstein
- Isaac Newton
- Joseph Fourier
- John Tyndall
Explanation: French mathematician Joseph Fourier first calculated that the Earth would be much colder without an atmosphere, proposing what we now call the greenhouse effect.
Which specific domestic sector currently accounts for the absolute largest share of India's total greenhouse gas emissions?
- Agriculture
- Industrial processes
- Transport sector
- Energy sector
Explanation: Due to a heavy reliance on coal-fired thermal power plants, the energy sector generates over 70% of India's total greenhouse gas emissions.
Which of the following classes of greenhouse gases is exclusively anthropogenic (entirely human-made)?
- Synthetic HFCs
- Carbon dioxide
- Nitrous oxide
- Methane gas
Explanation: Hydrofluorocarbons (HFCs) do not occur naturally; they are synthesized industrially for use in refrigeration and air conditioning.
Under the original framework of the Kyoto Protocol, 'Annex I' countries specifically refer to:
- Developed nations
- Developing nations
- Island states
- African countries
Explanation: Annex I countries under the UNFCCC and Kyoto Protocol are the industrialized nations that historically contributed the most to greenhouse gas accumulation.
The natural greenhouse effect, essential for keeping Earth warm, is primarily driven by which abundant atmospheric component?
- Ozone gas
- Carbon dioxide
- Methane gas
- Water vapor
Explanation: Water vapor is the most abundant greenhouse gas in the atmosphere and is responsible for the majority of the natural greenhouse effect.
Which specific UN body provides regular, comprehensive scientific assessments on climate change to the international community?
- The WHO
- The IPCC
- The UNEP
- The WMO
Explanation: The Intergovernmental Panel on Climate Change (IPCC) is the UN body responsible for assessing the science related to climate change.
A climate 'tipping point' refers to a critical threshold that, when crossed, leads to massive and irreversible:
- Cooling trends
- Economic booms
- System changes
- Population growth
Explanation: Tipping points are critical thresholds in the Earth's climate system that, once exceeded, can lead to large, accelerating, and irreversible changes.
The 'International Solar Alliance' (ISA), launched jointly by India and France to combat climate change, is headquartered in:
- Gurugram
- Geneva town
- New Delhi
- Paris city
Explanation: The ISA headquarters and its interim Secretariat are located at the National Institute of Solar Energy (NISE) in Gurugram, Haryana.
What term describes the localized warming caused by concrete structures trapping heat, making cities hotter than surrounding rural areas?
- Concrete heat warming
- Urban heat island
- Thermal surface inversion
- Summer heat wave
Explanation: The Urban Heat Island (UHI) effect occurs because dense concentrations of pavement, buildings, and other surfaces absorb and retain heat.
Which greenhouse gas has the highest Global Warming Potential (GWP) over a 100-year period?
- Sulfur hexafluoride
- Nitrous oxide
- Methane gas
- Carbon dioxide
Explanation: Sulfur hexafluoride (SF6) has a Global Warming Potential roughly 23,500 times greater than carbon dioxide over a 100-year timescale.
Which major greenhouse gas has the shortest atmospheric lifetime, lasting only about a decade before degrading?
- Nitrous oxide
- Carbon dioxide
- Sulfur hexafluoride
- Methane gas
Explanation: Methane has a relatively short atmospheric lifespan of about 12 years, but it is highly efficient at trapping radiation while it remains.
Stratospheric ozone protects the Earth, but ozone located in which atmospheric layer acts as a potent greenhouse gas?
- Mesosphere
- Troposphere
- Exosphere
- Thermosphere
Explanation: Tropospheric (ground-level) ozone is a secondary pollutant and a powerful greenhouse gas that heavily contributes to global warming.
Which short-lived climate pollutant is a major component of soot and strongly absorbs solar radiation?
- Sulfate aerosols
- White aerosols
- Black carbon
- Dust particles
Explanation: Black carbon is a potent climate-warming aerosol emitted from incomplete combustion of fossil fuels and biomass.
Global ocean warming significantly alters the distribution of marine species, causing them to systematically migrate towards:
- The equator
- The poles
- Deeper ocean trenches
- Coastal river estuaries
Explanation: As equatorial waters become too warm, marine life is forced to migrate toward the cooler waters of the North and South poles to survive.
The Paris Agreement aims to keep the global temperature rise well below how many degrees Celsius above pre-industrial levels?
- One degree
- Two degrees
- Four degrees
- Three degrees
Explanation: The Paris Agreement's central aim is to keep the global temperature rise this century well below 2 degrees Celsius, while pursuing efforts to limit it to 1.5 degrees.
Which highly reflective natural surface type has the highest natural albedo on Earth, reflecting most solar radiation?
- Dense tropical forest
- Open ocean water
- Dry desert sand
- Fresh white snow
Explanation: Fresh snow can reflect up to 90% of incoming solar radiation, giving it the highest natural albedo and a crucial cooling effect on the planet.
The 'Keeling Curve' is a famous continuous graph that specifically tracks the atmospheric accumulation of:
- Chlorofluorocarbons
- Carbon dioxide
- Nitrous oxide
- Methane gas
Explanation: Started by Charles David Keeling in 1958 at Mauna Loa, the Keeling Curve is the longest continuous record of atmospheric CO2 concentrations.
Under the Paris Agreement, countries submit their self-determined climate action pledges known by the acronym:
Explanation: Nationally Determined Contributions (NDCs) are the core of the Paris Agreement, outlining each country's efforts to reduce national emissions.
The dangerous release of methane clathrates (methane hydrates) frozen in the deep ocean floor is triggered primarily by:
- Salinity changes
- Tectonic plates
- Ocean warming
- Water acidification
Explanation: As ocean bottom temperatures rise, the pressure-temperature stability zone for methane hydrates shifts, causing them to melt and release methane.
The process of capturing CO2 from large point sources and storing it deep underground in geological formations is known as:
- Deep biochar burial
- Carbon offset credits
- CCS technology
- Global carbon trading
Explanation: Carbon Capture and Storage (CCS) prevents large amounts of CO2 from being released into the atmosphere by capturing and permanently storing it.
The vital biological process by which forests absorb carbon dioxide from the atmosphere and store it in biomass is called:
- Carbon sequestration
- Carbon footprint
- Carbon capture
- Carbon offsetting
Explanation: Biological carbon sequestration involves the long-term storage of carbon dioxide in plants, soils, and geologic formations to mitigate global warming.
Which Indian state launched the 'Mukhya Mantri Jal Swavlamban Abhiyan' to combat severe climate-induced water scarcity?
- Gujarat state
- Maharashtra state
- Karnataka state
- Rajasthan state
Explanation: Rajasthan launched this flagship scheme to ensure effective implementation of water conservation and water harvesting related activities in rural areas.
Melting Arctic sea ice accelerates global warming by drastically reducing the Earth's natural:
- Albedo effect
- Magnetic field
- Gravity field
- Carbon sink
Explanation: Ice is highly reflective. As it melts, darker ocean water is exposed, which absorbs more solar heat, lowering the planet's albedo.
Which foundational principle of the UNFCCC formally acknowledges the differing historical capabilities of developed and developing nations?
- Polluter pays
- CBDR principle
- Equal burden
- Precautionary rule
Explanation: Common But Differentiated Responsibilities (CBDR) recognizes that developed nations have historically contributed more to emissions and have greater capacity to act.
What standardized metric is used by the IPCC to compare the warming effect of different gases relative to carbon dioxide?
- GWP metric
- Emission factor
- Radiative forcing
- Carbon footprint
Explanation: Global Warming Potential (GWP) allows comparisons of the global warming impacts of different gases, using CO2 as the baseline (GWP of 1).
Earth emits the solar energy it absorbs back into space primarily in which region of the electromagnetic spectrum?
- Infrared region
- Visible light
- Microwave band
- Ultraviolet band
Explanation: The Earth absorbs shortwave solar radiation and re-emits it as longwave thermal infrared radiation, which greenhouse gases trap.
Which sector is currently the largest contributor to global anthropogenic greenhouse gas emissions?
- Transportation
- Energy production
- Deforestation
- Agriculture
Explanation: The burning of fossil fuels for electricity and heat production represents the largest single source of global greenhouse gas emissions.
The phenomenon where warmer temperatures cause more water evaporation, which in turn traps more heat, is called a:
- Neutral loop
- Positive feedback
- Cooling cycle
- Negative feedback
Explanation: A positive feedback loop amplifies changes. More heat means more water vapor (a greenhouse gas), which traps even more heat.
Which potent greenhouse gas is emitted primarily through the intense application of synthetic nitrogen fertilizers in agriculture?
- Ozone vapor
- Nitrous oxide
- Carbon dioxide
- Methane gas
Explanation: Nitrous oxide (N2O) is a powerful greenhouse gas released from agricultural soils, heavily driven by the use of synthetic nitrogen fertilizers.
What is the primary cause of mass coral bleaching events observed globally due to climate change?
- Deep ocean acidification
- High thermal stress
- Rapid sea level
- Salinity drop level
Explanation: Elevated sea temperatures cause corals to expel the symbiotic zooxanthellae algae living in their tissues, turning them completely white (bleaching).
A major consequence of unchecked global warming on the Amazon rainforest is the potential 'dieback', shifting it entirely into a:
- Desert biome
- Boreal forest
- Savanna ecosystem
- Mangrove swamp
Explanation: Climate models warn that rising temperatures and deforestation could push the Amazon past a tipping point, transforming the lush rainforest into a dry, degraded savanna.
Which new geological epoch has been proposed by scientists to reflect the massive, permanent impact of human activities on Earth?
- Holocene epoch
- Anthropocene
- Pleistocene
- Miocene
Explanation: The Anthropocene is a proposed geological epoch dating from the commencement of significant human impact on Earth's geology and ecosystems.
Permafrost thawing in the Siberian and Arctic tundras releases massive amounts of which potent greenhouse gas?
- Nitrogen gas
- Sulfur dioxide
- Methane gas
- Carbon monoxide
Explanation: As organic matter trapped in permafrost thaws and decomposes anaerobically, it releases immense quantities of methane.
The Kyoto Protocol introduced flexible market-based mechanisms, one of which allowed investments in developing nations called:
- Cap and trade
- Clean Development
- Carbon credit
- Carbon tax
Explanation: The Clean Development Mechanism (CDM) allowed developed countries to invest in emission-reduction projects in developing nations to earn carbon credits.
The 'Loss and Damage' fund, a historic agreement to compensate vulnerable nations facing climate impacts, was established at:
- COP 28
- COP 21
- COP 26
- COP 27
Explanation: At COP27 in Sharm El-Sheikh, Egypt, countries reached a landmark agreement to provide funding to vulnerable nations hit hard by climate disasters.
India's National Action Plan on Climate Change (NAPCC), launched in 2008, consists of how many core missions?
- Twelve missions
- Eight missions
- Five missions
- Ten missions
Explanation: The NAPCC encompasses eight core missions, including the National Solar Mission and the National Mission for Enhanced Energy Efficiency.
Which highly potent greenhouse gas is heavily utilized globally as an electrical insulator in high-voltage equipment?
- Pure methane
- Nitrogen gas
- Ozone layer
- SF6 gas
Explanation: Sulfur hexafluoride (SF6) is heavily used in the electrical power industry as an insulator and arc-quenching medium in switchgears.
Which term describes the theoretical large-scale, artificial modification of Earth's climate systems to counteract global warming?
- Afforestation
- Bioremediation
- Terraforming
- Geoengineering
Explanation: Geoengineering involves deliberate, large-scale interventions in the Earth's natural systems, such as solar radiation management or carbon capture.
Which of these is considered an external 'forcing' agent that initiates climate change, rather than a responsive 'feedback'?
- Solar irradiance
- Ice albedo
- Thick cloud cover
- Water vapor
Explanation: Climate forcings (like variations in solar output or volcanic eruptions) push the climate to change, whereas feedbacks (like ice melting) amplify or reduce that change.
The 'Carbon Budget' refers to the maximum allowable cumulative emissions to limit global warming ideally to:
- Two degrees
- One degree
- Four degrees
- Three degrees
Explanation: The carbon budget calculates how much CO2 can still be emitted globally while keeping warming below the 1.5°C or 2°C threshold.
Which natural climate phenomenon temporarily masks the effects of global warming by cooling the equatorial Pacific Ocean surface?
- Polar vortex
- El Nino
- Indian Dipole
- La Nina
Explanation: La Niña causes cooler-than-average sea surface temperatures in the central and eastern Pacific, temporarily depressing global average temperatures.
Which synthetic greenhouse gases, powerful climate warmers, were largely phased out by the Montreal Protocol to protect the ozone layer?
- PFC compounds
- SF6 gas
- HFC gases
- CFC gases
Explanation: Chlorofluorocarbons (CFCs) were phased out because they deplete the ozone layer, though they were also extremely potent greenhouse gases.
Under India's National Action Plan on Climate Change, the 'National Water Mission' aims to improve water use efficiency by:
- Ten percent
- Thirty percent
- Twenty percent
- Forty percent
Explanation: The National Water Mission sets a specific goal of increasing water use efficiency by 20% across various sectors through regulatory mechanisms and differential entitlements.