1. Question 1 of 100

   Which of the following is an example of a renewable energy transition supporting sustainability?

   A Increasing coal power plants B Expanding solar and wind energy infrastructure C Expanding oil drilling D Increasing deforestation for farmland
2. Question 2 of 100

   Conservation of biodiversity is important mainly because it:

   A Has no real benefit to humans B Maintains ecosystem stability, provides resources, and supports ecological balance C Only benefits endangered species D Increases pollution
3. Question 3 of 100

   The greenhouse effect refers to:

   A The cooling of Earth's surface due to clouds B The process of plants making food C The trapping of heat in Earth's atmosphere by certain gases, warming the surface D The movement of tectonic plates
4. Question 4 of 100

   Plastic pollution is a major environmental concern mainly because plastics:

   A Take a very long time to decompose and can harm wildlife B Decompose quickly and harmlessly C Are always recycled D Have no effect on oceans
5. Question 5 of 100

   The troposphere, the lowest layer of the atmosphere, is where:

   A The ozone layer is primarily located B Satellites typically orbit C No gases are present D Most weather phenomena occur
6. Question 6 of 100

   One observed effect of climate change is:

   A Completely stable weather patterns worldwide B More frequent and intense extreme weather events, such as heatwaves and storms C Decreased global average temperature D No change in precipitation patterns
7. Question 7 of 100

   Producers in an ecosystem are organisms that:

   A Consume other organisms for food B Make their own food, usually through photosynthesis C Decompose dead matter D Do not need energy
8. Question 8 of 100

   The Montreal Protocol (1987) is an international agreement specifically aimed at:

   A Reducing greenhouse gas emissions B Phasing out substances that deplete the ozone layer C Protecting marine biodiversity D Regulating deforestation
9. Question 9 of 100

   The environment refers to:

   A All the living and non-living things that surround and affect an organism B Only the air around us C Only plants and animals D Only human-made structures
10. Question 10 of 100

    Deforestation refers to:

    A Planting new trees B The large-scale removal or clearing of forests C Protecting forest areas D Growing crops in forests sustainably
11. Question 11 of 100

    Which of the following is an example of a climate change adaptation strategy?

    A Reducing fossil fuel use B Switching entirely to renewable energy C Planting forests to absorb CO₂ D Developing drought-resistant crop varieties for farmers facing changing rainfall patterns
12. Question 12 of 100

    Which of the following best supports sustainable development?

    A Using renewable resources responsibly and reducing waste B Overexploitation of natural resources C Ignoring environmental regulations D Maximizing fossil fuel consumption
13. Question 13 of 100

    Long-term climate monitoring and modeling, using tools like satellite data and climate models, are essential mainly because they help scientists:

    A Predict daily weather only B Replace the need for any environmental policy C Eliminate the need for emission reductions D Understand historical climate trends, project future changes, and inform policy decisions
14. Question 14 of 100

    Rising global temperatures can lead to the melting of glaciers, which primarily affects:

    A Only mountain scenery B Only wildlife in deserts C Nothing significant D Freshwater availability and sea levels
15. Question 15 of 100

    An invasive species is one that:

    A Is introduced to a new environment and causes ecological or economic harm B Is native to an ecosystem and maintains balance C Is always beneficial to local biodiversity D Cannot survive outside its native habitat
16. Question 16 of 100

    Which combination of factors is generally considered most critical in addressing climate change effectively at a global scale?

    A Individual action alone, without policy change B A combination of international cooperation, government policy, technological innovation, and individual/community action C Policy change alone, without any technological innovation D Relying solely on natural ecosystem recovery
17. Question 17 of 100

    Which of the following is a renewable natural resource?

    A Coal B Natural gas C Petroleum D Forests (if sustainably managed)
18. Question 18 of 100

    Which of the following practices contributes to sustainable water management?

    A Rainwater harvesting and efficient water use B Excessive groundwater extraction C Polluting water bodies D Ignoring water conservation entirely
19. Question 19 of 100

    Ocean acidification, linked to climate change, occurs because:

    A Oceans release oxygen into the air B Ocean temperatures decrease C Salt levels in oceans increase due to ice melting D Oceans absorb excess atmospheric CO₂, which forms carbonic acid in seawater
20. Question 20 of 100

    A species that is at risk of becoming extinct in the near future is classified as:

    A Abundant B Invasive C Domesticated D Endangered
21. Question 21 of 100

    Methane (CH₄) is released into the atmosphere mainly from:

    A Only burning fossil fuels B Only volcanic eruptions C Ocean currents only D Livestock digestion, landfills, and rice paddies, among other sources
22. Question 22 of 100

    Climate change refers to:

    A Only short-term weather fluctuations B Daily changes in temperature C Only changes in rainfall D Long-term shifts in temperature and weather patterns, largely driven by human activities in recent times
23. Question 23 of 100

    An ecosystem consists of:

    A Only living organisms B Only non-living components C Living organisms interacting with their non-living environment D Only plants
24. Question 24 of 100

    The biosphere is best defined as:

    A Only the oceans B The region of Earth where life exists C Only the atmosphere D Only the soil layer
25. Question 25 of 100

    Greenhouse gases trap heat by:

    A Reflecting all sunlight away from Earth B Absorbing and re-emitting infrared radiation, preventing heat from escaping into space C Blocking sunlight from reaching Earth entirely D Cooling the lower atmosphere
26. Question 26 of 100

    A factory currently emits 1000 tonnes of CO₂ annually. After installing cleaner technology, emissions are reduced by 35%. The new annual emission level is approximately:

    A 650 tonnes B 350 tonnes C 450 tonnes D 850 tonnes
27. Question 27 of 100

    World Environment Day is observed annually on:

    A March 21 B June 5 C April 22 D October 1
28. Question 28 of 100

    The ozone layer is located in which layer of the atmosphere?

    A Stratosphere B Troposphere C Mesosphere D Thermosphere
29. Question 29 of 100

    Acid rain is primarily caused by the release of which gases into the atmosphere?

    A Oxygen and nitrogen B Carbon dioxide only C Sulfur dioxide and nitrogen oxides D Water vapor
30. Question 30 of 100

    Which of the following is an example of a climate change mitigation strategy?

    A Building sea walls to protect coastal cities B Relocating communities after floods C Switching to renewable energy sources like solar and wind D Stockpiling emergency supplies
31. Question 31 of 100

    Decomposers play an important role in an ecosystem by:

    A Producing oxygen only B Consuming living plants only C Preventing photosynthesis D Breaking down dead organisms and recycling nutrients back into the environment
32. Question 32 of 100

    Water pollution occurs when harmful substances contaminate:

    A The air B Rivers, lakes, and oceans C The soil only D Forests
33. Question 33 of 100

    Ozone-depleting substances such as CFCs were historically used in:

    A Only food products B Refrigerants, aerosol sprays, and air conditioning systems C Only solar panels D Only fertilizers
34. Question 34 of 100

    Increased exposure to UV radiation due to ozone depletion can lead to a higher risk of:

    A Improved plant growth everywhere B Cooler global temperatures C No health effects D Skin cancer and eye cataracts in humans
35. Question 35 of 100

    Which of the following best reduces air pollution from vehicles?

    A Using public transport, electric vehicles, and proper vehicle maintenance B Driving more private vehicles C Avoiding all emission testing D Burning more fuel
36. Question 36 of 100

    A food chain shows:

    A The flow of energy from one organism to another through feeding relationships B Only the predators in an area C Only plant growth D The water cycle
37. Question 37 of 100

    Acid rain can cause damage to:

    A Only buildings B Only the ozone layer C Nothing significant D Forests, water bodies, and buildings/structures
38. Question 38 of 100

    Global mean sea level has risen due to climate change mainly as a result of two combined factors:

    A Increased rainfall and decreased evaporation B Thermal expansion of seawater and melting of land-based ice (glaciers and ice sheets) C Increased ocean salinity and wind patterns D Volcanic activity and earthquakes
39. Question 39 of 100

    The atmosphere is composed mainly of which two gases?

    A Oxygen and carbon dioxide B Hydrogen and helium C Nitrogen and oxygen D Argon and methane
40. Question 40 of 100

    The 3Rs of waste management commonly refer to:

    A Repair, Replace, Remove B Reduce, Reuse, Recycle C Read, Reflect, Record D Return, Report, Repeat
41. Question 41 of 100

    Eutrophication in water bodies is primarily caused by:

    A Lack of nutrients in water B Cold temperatures C Excess nutrients (like nitrogen and phosphorus) from fertilizers, leading to algal overgrowth D Low rainfall
42. Question 42 of 100

    Climate change mitigation refers to:

    A Actions taken to reduce or prevent the emission of greenhouse gases B Adapting to the effects of climate change after they occur C Ignoring climate change impacts D Only monitoring weather patterns
43. Question 43 of 100

    Climate change can affect agriculture by:

    A Always increasing crop yields everywhere B Having no effect on farming C Altering rainfall patterns and temperatures, which can reduce crop yields in many regions D Only benefiting farmers
44. Question 44 of 100

    The 'ozone hole' refers to a significant thinning of the ozone layer, historically observed most prominently over:

    A Antarctica (the South Pole region) B The Arctic only C The equator D North America only
45. Question 45 of 100

    Renewable energy sources such as solar, wind, and hydroelectric power help reduce climate change impacts mainly because they:

    A Produce significantly fewer greenhouse gas emissions compared to fossil fuels B Are completely free of any environmental impact C Cannot be used on a large scale D Increase reliance on coal
46. Question 46 of 100

    Rising global temperatures contribute to sea level rise mainly due to:

    A Melting ice and thermal expansion of seawater B Increased rainfall only C Decreased ocean salinity D Reduced evaporation
47. Question 47 of 100

    Consumers in an ecosystem are organisms that:

    A Produce their own food B Break down dead organic matter only C Obtain energy by eating other organisms D Do not require any energy
48. Question 48 of 100

    Without any greenhouse effect at all, Earth's average surface temperature would be:

    A Much warmer than it currently is B Much colder than it currently is, likely below freezing C Exactly the same as now D Impossible to determine
49. Question 49 of 100

    Melting permafrost due to climate change is concerning because it can release large amounts of:

    A Oxygen B Methane, a potent greenhouse gas, as organic matter decomposes C Nitrogen gas only D Helium
50. Question 50 of 100

    The United Nations Framework Convention on Climate Change (UNFCCC) was established to:

    A Promote industrial expansion B Regulate international trade only C Provide an international framework for addressing climate change and reducing greenhouse gas emissions D Manage global fisheries
51. Question 51 of 100

    If renewable energy sources currently supply 20% of a country's total energy and the government aims to increase this to 50% within a decade, the planned increase in renewable energy share is:

    A 20 percentage points B 50 percentage points C 70 percentage points D 30 percentage points
52. Question 52 of 100

    The loss of biodiversity due to habitat destruction is often linked to:

    A Sustainable farming practices only B Natural ecosystem balance C Deforestation, urbanization, and pollution D Ozone layer recovery
53. Question 53 of 100

    If global average temperature has risen by approximately 1.1°C above pre-industrial levels, and the Paris Agreement aims to limit warming to 1.5°C, the remaining 'carbon budget' concept refers to:

    A The total amount of money allocated to climate research B The number of trees needed to be planted immediately C The estimated amount of additional greenhouse gases that can be emitted while staying within a given temperature target D The cost of renewable energy infrastructure
54. Question 54 of 100

    Industrial smog is a type of air pollution commonly caused by:

    A Natural fog only B Only dust storms C Volcanic ash alone D The mixing of smoke and pollutants from industries with fog
55. Question 55 of 100

    Which of the following is a biotic (living) component of an ecosystem?

    A Sunlight B Water C Soil minerals D Plants and animals
56. Question 56 of 100

    Reforestation and afforestation help combat climate change mainly by:

    A Releasing more carbon dioxide into the atmosphere B Absorbing carbon dioxide from the atmosphere through photosynthesis C Increasing soil erosion D Reducing biodiversity
57. Question 57 of 100

    The Paris Agreement, adopted in 2015, set a key goal of limiting global warming to well below:

    A 2°C above pre-industrial levels, while pursuing efforts to limit it to 1.5°C B 1°C above pre-industrial levels C 5°C above pre-industrial levels D 10°C above pre-industrial levels
58. Question 58 of 100

    The main function of the ozone layer is to:

    A Trap heat near Earth's surface B Absorb most of the Sun's harmful ultraviolet (UV) radiation C Produce oxygen for breathing D Cause rainfall
59. Question 59 of 100

    Earth Day, observed annually to raise environmental awareness, is celebrated on:

    A April 22 B January 1 C June 5 D December 25
60. Question 60 of 100

    Natural resources are classified into:

    A Only renewable resources B Only non-renewable resources C Renewable and non-renewable resources D Only man-made resources
61. Question 61 of 100

    International cooperation on climate change is important because:

    A Climate change only affects one country at a time B Greenhouse gas emissions and their effects cross national borders, requiring a coordinated global response C Each country's emissions have no effect on others D Climate agreements have no practical purpose
62. Question 62 of 100

    The Intergovernmental Panel on Climate Change (IPCC) is primarily responsible for:

    A Enforcing international climate laws B Manufacturing renewable energy technology C Assessing and summarizing scientific research on climate change for policymakers D Managing the United Nations budget
63. Question 63 of 100

    Which of the following is a common cause of water pollution?

    A Planting trees near rivers B Rainwater harvesting C Discharge of untreated industrial waste into rivers D Using biodegradable materials
64. Question 64 of 100

    Which ecosystems are particularly vulnerable to the effects of climate change and ocean warming?

    A Coral reefs B Deserts only C Urban areas only D None are affected
65. Question 65 of 100

    The Kyoto Protocol, adopted in 1997, primarily aimed to:

    A Increase greenhouse gas emissions in developed countries B Ban all fossil fuel use immediately C Focus solely on ozone depletion D Set binding targets for developed countries to reduce greenhouse gas emissions
66. Question 66 of 100

    The primary human activity contributing to increased atmospheric CO₂ levels is:

    A Burning of fossil fuels (coal, oil, natural gas) B Photosynthesis by plants C Ocean evaporation D Animal respiration
67. Question 67 of 100

    A 'net-zero emissions' target refers to:

    A Producing zero energy B Completely stopping all industrial activity C Doubling current emissions D Balancing the amount of greenhouse gases emitted with an equivalent amount removed from the atmosphere
68. Question 68 of 100

    Sustainable development is best defined as development that:

    A Focuses only on economic growth regardless of environmental impact B Ignores social and environmental factors C Prioritizes short-term gains only D Meets the needs of the present without compromising the ability of future generations to meet their own needs
69. Question 69 of 100

    Biodiversity refers to:

    A Only the number of animal species in an area B Only plant diversity C The variety of life forms, including species, genetic, and ecosystem diversity, in a given area D Only the climate of a region
70. Question 70 of 100

    The enhanced (human-caused) greenhouse effect differs from the natural greenhouse effect mainly because it:

    A Involves completely different gases B Cools the Earth instead of warming it C Is caused by increased concentrations of greenhouse gases from human activities, intensifying natural warming D Only occurs at the poles
71. Question 71 of 100

    A region's vulnerability to climate change impacts (such as flooding or drought) is generally determined by a combination of:

    A Only the amount of rainfall B Only the population size C Exposure to climate hazards, sensitivity of the population/ecosystem, and adaptive capacity D Only the country's GDP
72. Question 72 of 100

    Efforts to phase out ozone-depleting substances have generally resulted in:

    A Continued rapid ozone depletion with no improvement B Gradual recovery and healing of the ozone layer over time C Complete destruction of the ozone layer D No measurable effect at all
73. Question 73 of 100

    Climate change is linked to more frequent and severe:

    A Only mild weather B Decreased storm activity worldwide C Droughts and wildfires in many regions D No notable weather changes
74. Question 74 of 100

    A protected area or national park is primarily established to:

    A Promote industrial development B Increase deforestation C Conserve natural habitats, wildlife, and biodiversity D Expand urban areas
75. Question 75 of 100

    A carbon sink is best described as:

    A A source that releases large amounts of carbon dioxide B A machine that produces CO₂ C A natural system (such as forests or oceans) that absorbs more carbon dioxide than it releases D A type of greenhouse gas
76. Question 76 of 100

    Comparing the global warming potential (GWP) of methane to carbon dioxide over a 100-year period, methane is generally considered to have a GWP that is:

    A Much lower than CO₂ B Roughly equal to CO₂ C Significantly higher than CO₂ (commonly cited as around 25-30 times greater) D Methane has no warming potential
77. Question 77 of 100

    Which of the following is a major source of air pollution?

    A Burning of fossil fuels in vehicles and factories B Photosynthesis in plants C Rainfall D Ocean currents
78. Question 78 of 100

    Global warming refers to:

    A A decrease in Earth's average surface temperature over time B Daily temperature changes C Seasonal temperature variation D A long-term increase in Earth's average surface temperature
79. Question 79 of 100

    A forest absorbs approximately 2.5 tonnes of CO₂ per hectare per year. The approximate CO₂ absorbed by a 100-hectare forest in one year is:

    A 250 tonnes B 25 tonnes C 100 tonnes D 2500 tonnes
80. Question 80 of 100

    One major environmental consequence of deforestation is:

    A Increased oxygen production B Decreased carbon dioxide in the atmosphere C Loss of biodiversity and habitat destruction D Improved soil fertility everywhere
81. Question 81 of 100

    Depletion of the ozone layer is primarily caused by:

    A Carbon dioxide emissions B Water vapor C Chlorofluorocarbons (CFCs) and related ozone-depleting substances D Nitrogen gas
82. Question 82 of 100

    Which gas is a major contributor to air pollution from vehicle exhaust?

    A Oxygen B Carbon monoxide C Nitrogen D Helium
83. Question 83 of 100

    Which of the following is NOT considered a major greenhouse gas?

    A Carbon dioxide B Methane C Nitrogen gas (N₂) D Water vapor
84. Question 84 of 100

    Air pollution is mainly caused by the release of harmful substances into the:

    A Soil B Rivers only C Oceans only D Atmosphere
85. Question 85 of 100

    Which of the following human activities contributes LEAST to greenhouse gas emissions?

    A Burning coal for electricity B Planting and preserving forests C Deforestation D Driving fossil-fuel-powered vehicles
86. Question 86 of 100

    If a country's annual CO₂ emissions are 500 million tonnes and it commits to reducing emissions by 20%, the new target emission level would be:

    A 100 million tonnes B 480 million tonnes C 600 million tonnes D 400 million tonnes
87. Question 87 of 100

    Nationally Determined Contributions (NDCs) under the Paris Agreement refer to:

    A Fixed global emission targets set by the UN B Only developed countries' emission targets C Military contributions to environmental protection D Each country's self-determined plans and targets to reduce greenhouse gas emissions
88. Question 88 of 100

    Which of the following is a non-renewable natural resource?

    A Coal B Solar energy C Wind D Fresh water from rainfall
89. Question 89 of 100

    Which of the following is an effective way to reduce pollution?

    A Increasing the use of single-use plastics B Recycling, reducing waste, and using cleaner energy sources C Burning more fossil fuels D Dumping waste into rivers
90. Question 90 of 100

    One major consequence of global warming is:

    A Permanent cooling of oceans B Decreased sea levels C No change in weather patterns D Melting of glaciers and polar ice caps
91. Question 91 of 100

    Carbon trading (or carbon credit trading) is a market-based approach that allows:

    A Companies to freely emit unlimited greenhouse gases B Only governments to emit greenhouse gases C Entities to buy and sell permits for greenhouse gas emissions, incentivizing overall reductions D Elimination of all emissions immediately
92. Question 92 of 100

    Noise pollution is primarily caused by:

    A Excessive, unwanted, or harmful sound levels B Water contamination C Air particles D Soil erosion
93. Question 93 of 100

    Which of the following gases is considered a major greenhouse gas?

    A Carbon dioxide (CO₂) B Nitrogen C Argon D Helium
94. Question 94 of 100

    An ecological footprint measures:

    A The physical size of an ecosystem B The number of species in an area C The temperature of a region D The impact of human activities on the environment, in terms of resource use and waste generation
95. Question 95 of 100

    Which of the following is an abiotic (non-living) component of an ecosystem?

    A Sunlight, water, and soil B Bacteria C Trees D Animals
96. Question 96 of 100

    Climate change adaptation refers to:

    A Reducing greenhouse gas emissions at the source B Adjusting human and natural systems to cope with the effects of climate change C Preventing all climate change entirely D Reversing industrialization
97. Question 97 of 100

    Which of the following is considered the primary driver of recent (post-industrial) climate change?

    A Human emissions of greenhouse gases from burning fossil fuels and deforestation B Natural volcanic activity alone C Ocean currents alone D Solar flares alone
98. Question 98 of 100

    Soil pollution is often caused by the excessive use of:

    A Organic compost B Crop rotation C Natural manure D Chemical pesticides and fertilizers
99. Question 99 of 100

    A habitat refers to:

    A Only the food an organism eats B The natural home or environment of an organism C Only the predators of an organism D The migration pattern of an organism
100. Question 100 of 100

     Ozone depletion and global warming (greenhouse effect) are:

     A Related but distinct environmental issues, with different primary causes B Exactly the same phenomenon C Completely unrelated with no overlap in causes D Both caused solely by deforestation

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