Environment MCQs

Correct Answer: Primary pollution

The correct answer is Primary pollution, as asked in this question on Environment.

Correct Answer: Emission of CO2 in air

The correct answer is Emission of CO2 in air, as asked in this question on Environment.

Correct Answer: Loss and Damage Fund

The correct answer is Loss and Damage Fund, as asked in this question on Environment.

Correct Answer: Secondary Pollutant

Smog is a secondary pollutant formed when primary pollutants like NO2 and volatile organic compounds react in sunlight.

Correct Answer: Emission of CO2 in air

Combustion of fossil fuels releases trapped carbon into the atmosphere, predominantly in the form of carbon dioxide (CO2).

Correct Answer: Urban drainage reservoir

Improved urban drainage systems, such as reservoirs and sustainable drainage, are standard solutions for flooding.

Correct Answer: Marine plastic pollution

The Great Pacific Garbage Patch is a massive accumulation of marine plastic pollution in the North Pacific Ocean.

Correct Answer: 33%

According to international environmental standards and Pakistan's own environmental policy, a minimum of 33% forest cover is required for a country to maintain ecological balance and environmental stability.

Correct Answer: 5 June

World Environment Day is celebrated annually on June 5th to encourage worldwide awareness and action for the protection of the environment.

Correct Answer: Wetlands & Traditional Knowledge

The theme for World Wetlands Day 2026 focuses on the intersection of wetlands conservation and traditional ecological knowledge.

Correct Answer: 33%

It is widely recommended that approximately 33% of a country's land area should be covered by forests to maintain ecological balance.

Correct Answer: All of them

Dry vegetation, low humidity, and high temperatures are all critical factors that increase the risk and intensity of wildfires.

Correct Answer: Biomass

Biomass is organic material from plants and animals that contains stored energy from the sun.

Correct Answer: Primary treatment

Sedimentation is a process used in the primary stage of wastewater treatment to allow heavy solids to settle out of the water.

Correct Answer: Particulate matter

Smog is a type of air pollution characterized by high concentrations of particulate matter and ground-level ozone.

Correct Answer: CFC

Chlorofluorocarbons (CFCs) are the primary chemicals responsible for the depletion of the Earth's ozone layer.

Correct Answer: Soil erosion

Deforestation removes the root systems that hold soil together, leading to an increase in soil erosion.

Correct Answer: Carbon Dioxide (CO2)

Carbon dioxide is a primary greenhouse gas that traps heat in the Earth's atmosphere, contributing significantly to global warming.

Correct Answer: All of these

Water sagacity, or water stewardship, is essential across all sectors, including industrial, agricultural, and domestic usage, to ensure sustainability and conservation.

Correct Answer: Trees

Trees play a vital role as environmental buffers by absorbing carbon dioxide, preventing soil erosion, and maintaining ecosystems.

Correct Answer: Deforestation

Deforestation removes vegetation cover that holds soil in place, making it significantly more susceptible to erosion by wind and water.

Correct Answer: Ganges River

The Ganges River faces severe environmental challenges and high levels of pollution due to industrial waste and human activity.

Correct Answer: Pollution

Environmental pollution is the introduction of harmful contaminants into the environment that cause adverse changes.

Correct Answer: China

China currently accounts for the highest annual carbon dioxide emissions globally due to its vast industrial base.

Correct Answer: Desertification

Desertification is the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.

Correct Answer: Acid rain caused by air pollution

Sulfur dioxide and nitrogen oxides in the air react with moisture to form acid rain, which corrodes the marble, a process known as stone cancer.

Correct Answer: All of these

Global warming causes thermal expansion of oceans, melting ice caps, and increased frequency of extreme weather.

Correct Answer: Urbanization and agriculture

The conversion of forests into land for farming, livestock, and urban development is the leading driver of global deforestation.

Correct Answer: Choke the drain

Polythene bags are non-biodegradable and often clog drainage systems, leading to severe waterlogging issues.

Correct Answer: Carbon Dioxide

Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities that drives global warming.

Correct Answer: Chlorine

Chlorine atoms released from CFCs are the primary cause of ozone layer depletion.

Correct Answer: Global warming

Greenhouse gases trap heat in the Earth's atmosphere, leading to a steady rise in global temperatures, known as global warming.

Correct Answer: Carbon dioxide

While Carbon Monoxide is highly toxic, Carbon Dioxide (CO2) is considered the most significant greenhouse gas pollutant driving long-term climate change.

Correct Answer: Ultra violet rays

The ozone layer in the stratosphere absorbs most of the Sun's harmful ultraviolet (UV) radiation.

Correct Answer: Acid rain

Emissions of sulfur dioxide and nitrogen oxides mix with water vapor in the atmosphere, creating acid rain.

Correct Answer: Nylon

Nylon is a synthetic polymer that does not break down naturally in the environment, making it non-biodegradable.

Correct Answer: Greenhouse gases

Greenhouse gases (like CO2 and methane) trap heat in the atmosphere, leading to an increase in Earth's temperature.

Correct Answer: Methane

Methane is highly effective at trapping heat; over a 20-year period, it is more than 80 times more potent than carbon dioxide as a greenhouse gas.

Correct Answer: 22 kg

A mature tree absorbs approximately 22 kg (about 48 lbs) of carbon dioxide from the atmosphere each year.

Correct Answer: Acid rain

Acid rain alters the pH of the soil, stripping it of essential nutrients and causing significant soil pollution and degradation.

Correct Answer: Global Change Impact

Climate change and global warming impacts cause extreme weather events like prolonged droughts and severe temperature changes.

Correct Answer: China

China is currently the world's largest emitter of carbon dioxide and greenhouse gases, largely due to its massive industrial sector and reliance on coal.

Correct Answer: Atmosphere

Incoming solar radiation is partially absorbed, scattered, and reflected back into space by various layers, clouds, and gases in the Earth's atmosphere.

Correct Answer: None of these

Conservation reports indicate that illegal poaching has caused the pangolin population in Pakistan to decline by over 80%.

Correct Answer: 48 Pounds

A mature tree can absorb roughly 48 pounds (approx. 22 kilograms) of carbon dioxide from the atmosphere in a single year.

Correct Answer: Eutrophication

Eutrophication occurs when a body of water becomes overly enriched with minerals and nutrients, leading to excessive algae growth and subsequent oxygen depletion.

Correct Answer: All of these

Air pollution is caused by a mix of natural events (like volcanic eruptions) and human activities (like vehicle exhausts and industrial emissions).

Correct Answer: Spray cans and refrigerators

Chlorofluorocarbons (CFCs), historically used in aerosols, refrigerators, and air conditioning units, break down ozone molecules in the stratosphere.

Correct Answer: Ultraviolet rays

The ozone layer located in the stratosphere acts as a shield, absorbing the majority of the sun's harmful ultraviolet (UV) radiation.

Correct Answer: Kyoto Protocol

The concept of carbon credits and emissions trading was formalized under the Kyoto Protocol in 1997.

Correct Answer: Contamination of Ground water

Hazardous waste can leach into the earth, heavily contaminating groundwater aquifers which are a critical source of drinking water.

Correct Answer: Carbon dioxide

An excess of carbon dioxide (CO2) and other greenhouse gases traps heat in the atmosphere, accelerating global warming.

Correct Answer: Beneficial

The ozone layer plays a beneficial role, shielding life on earth from harmful ultraviolet radiation.