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Environment & Ecology GK Questions with Answers – Page 7

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Environment & Ecology multiple choice questions with answers and explanations, 20 per page, for SSC, Banking, UPSC, Railway and state exams.

805 questions

Environment & Ecology NotesOnly previous-year questions (368)GK Quiz
Q121.Environment & EcologyAsked in: CDS · CDS-II 2024, GKHard

Which one of the following is not among the thematic areas of National Mission on Sustainable Habitat?

  1. A.Energy and Green Building
  2. B.Mobility and Air Quality
  3. C.Waste Management
  4. D.Rural Planning, Green cover and Biodiversity
Show answer
Correct answer: D. Rural Planning, Green cover and Biodiversity

The mission's thematic area is Urban Planning, Green Cover and Biodiversity, because the mission is about cities, not villages.

Q122.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2021, GS Paper IMedium

How is permaculture farming different from conventional chemical farming?

1. Permaculture farming discourages monocultural practices but in conventional chemical farming, monoculture practices are predominant.

2. Conventional chemical farming can cause increase in soil salinity but the occurrence of such phenomenon is not observed in permaculture farming.

3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions.

4. Practice of mulching is very important in permaculture farming but not necessarily so in conventional chemical farming.

Select the correct answer using the code given below.

  1. A.1 and 3
  2. B.1, 2 and 4
  3. C.4 only
  4. D.2 and 3
Show answer
Correct answer: B. 1, 2 and 4

Permaculture avoids monoculture, does not build up salt in the soil and relies on mulching; only statement 3 is wrong.

Q123.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

With reference to "Gucchi" sometimes mentioned in the news, consider the following statements:

1. It is a fungus.

2. It grows in some Himalayan forest areas.

3. It is commercially cultivated in the Himalayan foothills of north-eastern India.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.3 only
  3. C.1 and 2
  4. D.2 and 3
Show answer
Correct answer: C. 1 and 2

Gucchi is the morel mushroom, a fungus that grows wild in Himalayan forests, but it is not commercially cultivated. Gucchi (Morchella esculenta) has a honeycomb-like cap and is one of the costliest mushrooms in the world, often selling for tens of thousands of rupees a kilogram.

Q124.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IHard

In the context of WHO Air Quality Guidelines, consider the following statements:

1. The 24-hour mean of PM2.5 should not exceed 15 µg/m³ and annual mean of PM2.5 should not exceed 5 µg/m³.

2. In a year, the highest levels of ozone pollution occur during the periods of inclement weather.

3. PM10 can penetrate the lung barrier and enter the bloodstream.

4. Excessive ozone in the air can trigger asthma.

Which of the statements given above are correct?

  1. A.1, 3 and 4
  2. B.1 and 4 only
  3. C.2, 3 and 4
  4. D.1 and 2 only
Show answer
Correct answer: B. 1 and 4 only

The 2021 WHO guidelines set PM2.5 at 15 µg/m³ for a 24-hour mean and 5 µg/m³ for the annual mean, and ground-level ozone is a known trigger of asthma attacks.

Q125.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IHard

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements :

1. Biofilters provide waste treatment by removing uneaten fish feed.

2. Biofilters convert ammonia present in fish waste to nitrate.

3. Biofilters increase phosphorus as nutrient for fish in water.

How many of the statements given above are correct?

  1. A.Only one
  2. B.Only two
  3. C.All three
  4. D.None
Show answer
Correct answer: A. Only one

Only statement 2 is correct: the biofilter's job in a Recirculating Aquaculture System is to turn toxic ammonia into much less harmful nitrate.

Q126.Environment & EcologyAsked in: UPSC CAPF · CAPF 2023, Paper IHard

What is 'Climate Neutral Now' initiative?

1. It encourages organizations and other interested stakeholders to act now in order to achieve a carbon neutral world by 2030.

2. It derives its aims from the Paris Agreement.

Select the correct answer using the code given below :

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: B. 2 only

Climate Neutral Now takes its aim from the Paris Agreement, but the target it works towards is a climate-neutral world by the middle of the century, not by 2030.

Q127.Environment & EcologyAsked in: UPSC CAPF · CAPF 2023, Paper IHard

Which of the following statements is/are correct about 'Action for Climate Empowerment' (ACE)?

1. It is a term adopted by the UN Framework Convention on Climate Change.

2. This term is related to the Paris Agreement.

Select the correct answer using the code given below:

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: C. Both 1 and 2

Action for Climate Empowerment is the UNFCCC's own name for its work on climate education and public awareness, and it covers the Paris Agreement too.

Q128.Environment & EcologyAsked in: UPSC CAPF · CAPF 2017, Paper IEasy

Which one of the following is NOT correct about organic farming?

  1. A.It does not use genetically modified seeds
  2. B.Synthetic pesticides or fertilizers are not used
  3. C.It uses minimal crop rotation
  4. D.It uses ecologically protective practices
Show answer
Correct answer: C. It uses minimal crop rotation

Organic farming relies heavily on crop rotation, not on as little of it as possible, so this is the statement that is not correct.

Q129.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IMedium

Consider the following statements :

1. Agricultural soils release nitrogen oxides into environment.

2. Cattle release ammonia into environment.

3. Poultry industry releases reactive nitrogen compounds into environment.

Which of the statements given above is/are correct?

  1. A.1 and 3 only
  2. B.2 and 3 only
  3. C.2 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

Fertilised soils, cattle and poultry are all major sources of reactive nitrogen in the environment. Reactive nitrogen means nitrogen in forms other than the inert N₂ gas of the air, such as ammonia, nitrogen oxides, nitrous oxide and nitrate.

Q130.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

"If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys." Which one of the following functions of wetlands best reflects the above statement ?

  1. A.The water cycle in wetlands involves surface runoff, subsoil percolation and evaporation.
  2. B.Algae form the nutrient base upon which fish, crustaceans, molluscs, birds, reptiles and mammals thrive.
  3. C.Wetlands play a vital role in maintaining sedimentation balance and soil stabilization.
  4. D.Aquatic plants absorb heavy metals and excess nutrients.
Show answer
Correct answer: D. Aquatic plants absorb heavy metals and excess nutrients.

Kidneys filter waste from the blood, and wetlands likewise filter pollutants out of the water that passes through them.

Q131.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

What is/are unique about 'Kharai camel', a breed found in India?

1. It is capable of swimming up to three kilometres in seawater.

2. It survives by grazing on mangroves.

3. It lives in the wild and cannot be domesticated.

Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: A. 1 and 2 only

The Kharai camel of Kutch in Gujarat can swim through seawater to reach mangrove islands, where it feeds on mangrove leaves.

Q132.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IEasy

In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as

  1. A.pesticides in agriculture
  2. B.preservatives in processed foods
  3. C.fruit-ripening agents
  4. D.moisturising agents in cosmetics
Show answer
Correct answer: A. pesticides in agriculture

Carbofuran, methyl parathion, phorate and triazophos are all insecticides sprayed on crops, and all are highly toxic. Carbofuran is a carbamate; methyl parathion, phorate and triazophos are organophosphates.

Q133.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

"Climate Action Tracker" which monitors the emission reduction pledges of different countries is a :

  1. A.Database created by coalition of research organisations
  2. B.Wing of "International Panel of Climate Change"
  3. C.Committee under "United Nations Framework Convention on Climate Change"
  4. D.Agency promoted and financed by United Nations Environment Programme and World Bank
Show answer
Correct answer: A. Database created by coalition of research organisations

The Climate Action Tracker is an independent scientific analysis run by research groups, not by any UN body. It is produced mainly by two non-profit research organisations, Climate Analytics and the NewClimate Institute, and has tracked national climate action since 2009.

Q136.Environment & EcologyAsked in: UPSC CAPF · CAPF 2017, Paper IEasy

Which of the following diseases are caused by the consumption of water contaminated by mercury and nitrate ?

  1. A.Minamata disease and Osteoporosis
  2. B.Osteoporosis and Blue Baby Syndrome
  3. C.Minamata disease and Blue Baby Syndrome
  4. D.Osteoporosis and Minamata disease
Show answer
Correct answer: C. Minamata disease and Blue Baby Syndrome

Mercury in water causes Minamata disease, and excess nitrate causes blue baby syndrome.

Q137.Environment & EcologyAsked in: UPSC CAPF · CAPF 2021, Paper IMedium

Where is Asan Conservation Reserve located?

  1. A.Himachal Pradesh
  2. B.Uttarakhand
  3. C.Sikkim
  4. D.Arunachal Pradesh
Show answer
Correct answer: B. Uttarakhand

The Asan Conservation Reserve lies in Dehradun district of Uttarakhand. The reserve is a stretch of the Asan river near its meeting with the Yamuna, where a barrage built in 1967 created a wetland.

Q138.Environment & EcologyAsked in: CDS · CDS-II 2016, GKMedium

Excessive use of which of the following fertilizers may be responsible for the presence of a toxic substance in groundwater?

  1. A.Nitrogen
  2. B.Phosphate only
  3. C.Potassium only
  4. D.Phosphate and potassium
Show answer
Correct answer: A. Nitrogen

Excess nitrogen fertilizer turns into nitrate, which dissolves easily, seeps down through the soil and contaminates groundwater. Urea and other nitrogen fertilizers are converted by soil bacteria into nitrate ions.

Q139.Environment & EcologyAsked in: CDS · CDS-I 2022, GKEasy

Which one of the following is the main reason of acid rains ?

  1. A.Dissolution of sulphur and nitrogen oxides in rain
  2. B.Dissolution of minerals in rain
  3. C.Dissolution of dust particles in rain
  4. D.Dissolution of soil solution in rain
Show answer
Correct answer: A. Dissolution of sulphur and nitrogen oxides in rain

These gases react with water in the air to form sulphuric and nitric acids, which fall as acid rain. Sulphur dioxide comes mainly from burning coal and oil in power plants and smelters, and nitrogen oxides from vehicle engines and high-temperature furnaces.

Q140.Environment & EcologyAsked in: CDS · CDS-I 2024, GKEasy

The use of plastics has led to a number of environment-related problems. For this, which one of the following statements is correct?

  1. A.They are non-biodegradable.
  2. B.They do not get released into water and food.
  3. C.They do not have any biochemical synthesis activity.
  4. D.They are harmless to humans.
Show answer
Correct answer: A. They are non-biodegradable.

Bacteria and fungi cannot break down most plastics, so plastic waste stays in soil and water for hundreds of years.