UPPSC 2025 Prelims GS Paper-I · Question 134 of 150

Correct — A, Only 2. Carrying capacity is always stated as a pair of conditions, one about what we take out of the environment and one about what we put back into it, and this question keeps the second intact while quietly reversing the first. Statement 1 says the rate of resource extraction should remain ABOVE the rate of resource generation. That is the definition of living beyond carrying capacity, not within it. If you harvest a forest, a fishery or an aquifer faster than it renews itself, the stock shrinks year on year until it is gone; the requirement is the exact opposite — extraction must stay at or below the rate of regeneration, so that the resource base is handed on undiminished. The word 'above' is the whole error, and it is a single word in an otherwise textbook sentence. Statement 2 is correct as printed. Every environment has an assimilative or absorptive capacity: a river can break down a certain load of organic waste, soil can process a certain quantity of effluent, the atmosphere can disperse a certain volume of emissions. So long as waste generation stays within that capacity, the environment neutralises it and no pollution problem builds up. Push past it and the waste accumulates, which is what pollution actually is. Note the code layout too, because UPPSC has shuffled it on this paper: (a) is 'Only 2' and (d) is 'Only 1'. Statement 2 alone being correct, the answer is (a).

• (b)Both 1 and 2 — This is the option most candidates lose the mark to, because the sentence in statement 1 looks entirely familiar. It uses the right vocabulary — rate of extraction, rate of generation — in the right frame, and a reader skimming for keywords will nod it through. But the inequality runs the wrong way. Sustainability requires extraction to stay at or below regeneration; a system in which extraction stays above regeneration is by definition depleting its resource base. Statement 2 is fine, so accepting both means accepting a reversed inequality on the strength of familiar words.
• (c)Neither 1 nor 2 — Over-correction. Having spotted that statement 1 is bent, a candidate may conclude that the whole question is a plant and reject the second statement too. Statement 2 is, however, a straight and standard formulation: waste generation must remain within the absorption capacity of the environment, which is the sink-side half of carrying capacity. Nothing in it is exaggerated or reversed.
• (d)Only 1 — Wrong twice over — it accepts the one statement that has been tampered with and rejects the one that is accurate. A candidate reaches this option in one of two ways: by reading statement 1 too quickly and dismissing statement 2 as too obvious to be the intended answer, or by deciding correctly that only one statement is right and then marking the slot where 'Only 1' usually sits without checking that on this paper 'Only 1' has been moved to (d).

Carrying capacity is the level of use an environment can sustain indefinitely without being degraded, and it has two sides that must both be respected. On the source side, the environment supplies resources — timber, fish, groundwater, soil fertility — and use is sustainable only while the rate of extraction does not exceed the rate at which those resources regenerate. On the sink side, the environment absorbs the residues of economic activity, and use is sustainable only while the rate at which waste is generated does not exceed the environment's assimilative capacity. This twin condition is what links carrying capacity so tightly to the Brundtland Commission's definition of sustainable development, meeting the needs of the present without compromising the ability of future generations to meet their own needs: the resource stock and the absorptive capacity are exactly the inheritance being protected. Crossing the first limit produces resource depletion; crossing the second produces pollution. Most environmental problems can be filed under one of the two.

Handle a question like this the way you would handle a proof-reading exercise, because that is what it is. The examiner has taken a settled textbook sentence and changed one word. Read each statement slowly enough to hear the inequality: does it say extraction should be above regeneration or below it? Does it say waste should be within the absorption capacity or beyond it? A useful test is to ask what happens if the statement were followed for a hundred years. Follow statement 1 as printed — always extract faster than the resource regenerates — and the resource is gone. A rule whose consistent application destroys the thing it governs cannot be a rule of sustainability. Follow statement 2 and nothing accumulates, which is the whole point. Then read the code carefully. On this 2025 paper (a) is 'Only 2', (b) is 'Both 1 and 2', (c) is 'Neither 1 nor 2' and (d) is 'Only 1' — the same shuffled layout used at Q131 — so the habit of marking (a) for 'only 1' will cost you a question you have actually understood.

• Carrying capacity has a source-side condition (resource extraction must not exceed the rate of regeneration) and a sink-side condition (waste generation must not exceed the environment's assimilative capacity); the question reverses the first and leaves the second intact
• Exceeding the source-side limit produces resource depletion — falling water tables, collapsing fisheries, deforestation; exceeding the sink-side limit produces pollution
• Assimilative or absorptive capacity is the environment's ability to receive, dilute and break down waste without lasting harm — a river's capacity to oxidise organic effluent is the standard illustration
• The idea sits at the core of the Brundtland Commission's 1987 report Our Common Future, which defined sustainable development as meeting present needs without compromising the ability of future generations to meet theirs
• The Club of Rome's Limits to Growth (1972) is the classic modelling statement of a planetary carrying capacity, arguing that unchanged trends in population, industrialisation, pollution, food production and resource depletion would run into the planet's limits within a century

• A single reversed word inside a familiar sentence. 'Above the rate of regeneration' reads almost exactly like 'below the rate of regeneration' when you are skimming — but it turns a rule of sustainability into a description of depletion
• The shuffled code. On this paper (a) is 'Only 2' and (d) is 'Only 1'. Decide the statements first, write the verdict in the margin, then look for that combination among the printed options
• Rejecting a statement for being too obvious. Statement 2 is plain and correct; examiners routinely pair one tampered statement with one straightforward one, and the straightforward one is not a trick

UPPSC likes environment questions of the definitional kind — carrying capacity, sustainable development, assimilative capacity — usually as a two-statement item in which one statement is bent by a single word or a reversed comparison. UPSC has asked the same concept as a direct conceptual link, requiring the candidate to identify which idea the Brundtland definition of sustainable development is inherently intertwined with.

• practice — not a real PYQ

  The term 'assimilative capacity of the environment' refers to

  • (a)the maximum rate at which a renewable resource can regenerate itself
  • (b)the ability of the environment to receive and break down waste without suffering lasting damage
  • (c)the total stock of non-renewable resources available within a nation's territory
  • (d)the share of national income spent on pollution-control equipment

  Answer(b) the ability of the environment to receive and break down waste without suffering lasting damage — this is the sink-side half of carrying capacity, and pollution is what happens when waste generation exceeds it.

• practice — not a real PYQ

  Consider the following statements about sustainable use of a renewable resource such as groundwater: 1. Withdrawal should not exceed the rate of natural recharge. 2. Waste discharged into the aquifer should remain within its capacity to assimilate it. Which of the statements given above is/are correct?

  • (a)Only 1
  • (b)Only 2
  • (c)Both 1 and 2
  • (d)Neither 1 nor 2

  Answer(c) Both 1 and 2 — these are the source-side and sink-side conditions of carrying capacity applied to a single resource; groundwater is unsustainable if either limit is breached.