Environment and Sustainable Development

Total Questions: 95

21. If all the plants and trees vanish from the earth, the gas which will decrease is - [R.A.S./R.T.S.(Pre) 2012]

Correct Answer: (d) Oxygen
Solution:If all plants and trees were to vanish from the Earth, the gas that would decrease is Oxygen. Plants produce oxygen as a byproduct of photosynthesis, the process they use to convert carbon dioxide and water into energy with the help of sunlight.

Without plants, this vital process would cease, leading to a rapid decline in atmospheric oxygen, making the planet uninhabitable for most life forms.

the photosynthesis process

22. Which of the following is not a function of the tree? [R.A.S./R.T.S. (Pre) 1993]

Correct Answer: (c) Air pollution
Solution:Trees are essential for the environment and perform many beneficial functions. They absorb carbon dioxide for photosynthesis, help to absorb noise by acting as a natural barrier, and release oxygen into the atmosphere.

Air pollution is a negative outcome of human activity, which is detrimental to trees and the environment; it is not a function they perform.

23. Out of total Oxygen present in the earth's atmosphere, the estimated production of oxygen by Amazon forest through photosynthesis is - [Raj. P.C.S. (Pre) 2023]

Correct Answer: (d) 20 percent
Solution:Amazon forest is estimated to Produce, through Photosynthesis, about 20 percent of the total oxygen in the earth's atmosphere, hence named 'Lungs of Earth'. Amazon Forest contains nearly a third of all the tropical rainforests left on Earth.
  • The Amazon Basin encompasses 7,000,000 km². (2,700,000 sq mi), of which 5,500,000 km² (2,100,000 sq mi) are covered by the rainforest.
  • The majority of the forest is contained within Brazil, with 60% of the rainforest, followed by Peru with 13%, Colombia with 10%, and with minor amounts present in Venezuela, French Guiana, Bolivia, Ecuador, Suriname.
  • More than 30 million people of 350 different ethnic groups live in the Amazon which are subdivided into 9 different national political systems and 3,344 formally acknowledged indigenous territories.
  • More than 56% of the dust fertilizing the Amazon rainforest comes from the Bodele depression in Northern Chad in the Sahara desert. The dust contains phosphorus, important for plant growth.
  • The region is home to about 2.5 million insect species, tens of thousands of plants, and some 2,000 birds and mammals. To date, at least 40,000 plant species, 2,200 fishes, 1294 birds, 427 mammals, 428 amphibians, and 378 reptiles have been

24. Environmental degradation means- [U.P.P.C.S. (Pre) 2006]

Correct Answer: (d) All of the above
Solution:Environmental degradation is a broad term that encompasses the negative changes to the environment. It involves an overall lowering of environmental qualities through the depletion of resources, destruction of ecosystems, and extinction of wildlife.

This is primarily caused by adverse changes brought in by human activities, which ultimately lead to ecological imbalance. All these factors are interconnected and contribute to the overall degradation of the environment.

25. The idea of weathering is related to- [Uttarkhand P.C.S. (Pre) 2006]

Correct Answer: (c) A natural phenomena that breaks rocks into fine particles.
Solution:Weathering is the process by which rocks and minerals are broken down into smaller pieces, or sediment, without being moved.

It is a natural geological process that can be caused by physical factors like freezing water expanding in cracks, or chemical reactions like acid rain dissolving minerals. This is distinct from erosion, which involves the movement of these broken-down materials.

26. Which one of the following is not relate to environmental protection? [U.P.UDA/LDA (Pre) 2013]

Correct Answer: (b) Poverty Alleviation
Solution:Environmental protection involves actions that mitigate harm to the environment. Sustainable development aims to meet human needs while preserving the environment, poverty alleviation often indirectly helps as poverty can lead to environmental exploitation, and the use of paper bags instead of plastic reduces waste.

Air conditioning, while essential for comfort, consumes significant amounts of energy and often uses refrigerants that contribute to climate change, making it a technology that can negatively impact the environment.

27. Consider the following statement : [I.A.S. (Pre) 2016]

  1.  The Sustainable Development Goals were first proposed in 1972 by a global think tank called the 'Club of Rome'.
  2. The Sustainable Development Goals have to be achieved by  2030.

Which of the statements given above is/are correct?

Correct Answer: (b) 2 only
Solution:The Sustainable Development Goals (SDGs) were adopted by the United Nations in 2015 with a target date for achievement of 2030. The statement that they were first proposed in 1972 is incorrect.

The 1972 meeting in Stockholm was a key moment for international environmental policy, and a global think tank called the Club of Rome did publish "The Limits to Growth" that year, but the SDGs themselves are a more recent initiative.

28. What is sustainable development? [Jharkhand P.C.S. (Pre), 2023]

Correct Answer: (d) All of the above
Solution:Sustainable development is an integrated concept that encompasses economic development, environmental development, and social development.

The famous definition from the Brundtland Commission Report emphasizes that development must meet the needs of the present without compromising the ability of future generations to meet their own needs. This requires balancing all three pillars—economy, environment, and society—for long-term well-being.

the three pillars of sustainability

29. What is India's rank in the 2017 Sustainable Development Goal Index? [U.P.P.C.S. (Pre) 2017]

Correct Answer: (a) 116ᵗʰ
Solution:India has been ranked 116th out of 157 nations with a score of 58.1 at the 2017 Sustainable Development Goals (SDGs) index and Dashboards Report that assesses the performance of countries towards achieving the ambitious SDGs. Sweden has topped the list, followed by Denmark and Finland.
  • It is a global network established in 2012 by the United Nations (UN).
  • It aims to promote practical solutions for achieving the Sustainable Development Goals (SDGs) at national and international levels.
  • It focuses on mobilising expertise by connecting universities, research institutions, and national laboratories to identify and develop solutions for tackling critical sustainability challenges.
  • The Secretariat of the SDSN is located in Paris, France; Kuala Lumpur, Malaysia and New York, US.
  • Only 16% of SDG targets are on track to be achieved by 2030, with 84% showing limited or reversed progress.
  • Since 2020, global SDG progress has stagnated, particularly for SDGs 2 (Zero Hunger), 11 (Sustainable Cities), 14 (Life Below Water), 15 (Life on Land), and 16 (Peace, Justice, and Strong Institutions).
  • Significant reversals in progress is observed in obesity rates (SDG 2), press freedom (SDG 16), red list index (SDG 15), sustainable nitrogen management (SDG 2), and life expectancy at birth (SDG 3), influenced by Covid-19 and other factors.
  • Progress towards SDG9 (Industry, Innovation, and Infrastructure), is showing slightly positive trends.

30. Which of the following states is NOT in the list of top five states on the Sustainable Development Goals Index, 2019-20 India? [U.P.B.E.O. (Pre) 2019]

Correct Answer: (a) Gujarat
Solution:According to NITI Aayog's Index-2020 top-5 states and respective scores are following.
StateScore
Kerala75
Himachal Pradesh74
Tamil Nadu74
Andhra Pradesh72
Goa72
Karnataka72