UPPSC 2019 Prelims GS Paper-I · Question 35 of 150

Correct — A, inverted 'U' shaped. The Environmental Kuznets Curve is the hypothesis that as per capita income rises, environmental degradation first increases, reaches a peak at some turning-point level of income, and then declines — tracing a smooth inverted U when degradation is plotted on the vertical axis against per capita GDP on the horizontal axis. The reasoning behind the two arms is that early industrialisation is dirty and resource-hungry, while richer societies shift towards services, adopt cleaner technology, and demand and can afford stricter environmental regulation. The name is borrowed from Simon Kuznets, who in 1955 proposed a similar inverted-U path for income inequality as an economy develops; the environmental version was popularised by empirical work in the early 1990s, and the label itself is generally credited to Thomas Panayotou (1993).

• (b)Inverted 'V' shaped — An inverted V implies a sharp kink — degradation rising in a straight line, turning abruptly at a single point, and falling in a straight line. The EKC is described and estimated as a smooth curve with a gradual turning point, not a peak with a corner.
• (c)Inverted 'L' shaped — An inverted L would mean degradation is high from the very start and then simply drops away — it has no rising arm. The whole point of the EKC is that degradation first worsens as a poor economy industrialises, and only later improves.
• (d)None of these — Not applicable, since the inverted-U description in option (a) is the standard textbook statement of the Environmental Kuznets Curve.

The Environmental Kuznets Curve is a claim about the path, not a law of nature: it says the relationship between per capita income and environmental damage is non-monotonic. Economists usually decompose it into three effects — a scale effect (more output means more pollution), a composition effect (the economy shifts from agriculture to industry and then to less polluting services), and a technique effect (richer countries use cleaner methods and enforce tougher standards). While the scale effect dominates, the curve rises; once composition and technique effects outweigh it, the curve turns down. That turning point is estimated from data and differs sharply from one pollutant and one country to another.

Two things get you the mark here. First, the shape: 'Kuznets' is the signal for an inverted U, because the original 1955 Kuznets curve made the same claim about income inequality rising and then falling with development. Second, resist the geometric distractors — an exam that offers inverted V and inverted L is testing whether you know the curve is smooth and has a genuine rising phase. It is also worth carrying the honest caveat: the evidence supports an inverted U mainly for local pollutants whose harm is felt where they are produced, such as sulphur dioxide, particulates and waterborne contamination. For carbon dioxide, municipal waste and biodiversity loss the downturn is weak or absent, and critics point out that some of the apparent cleanup in rich countries simply reflects dirty production being relocated abroad.

• The Environmental Kuznets Curve plots environmental degradation against per capita income and takes an inverted-U shape.
• Degradation rises during early industrialisation, peaks at a turning-point income level, and then falls as economies shift to services, adopt cleaner technology and tighten regulation.
• It is named after Simon Kuznets, whose 1955 hypothesis described an inverted-U path for income inequality during development; Kuznets received the Nobel Prize in Economics in 1971.
• The environmental version grew out of empirical work in the early 1990s, and the term is generally credited to Thomas Panayotou (1993).
• The inverted U fits local pollutants such as sulphur dioxide and particulates far better than carbon dioxide, waste generation or biodiversity loss.
• A standard criticism is the 'pollution haven' effect: part of the apparent improvement in rich countries reflects the relocation of polluting production to poorer ones.

• Reading the EKC as a promise that growth automatically fixes the environment — it is an empirical hypothesis that holds for some pollutants and not others.
• Confusing the Environmental Kuznets Curve with the original Kuznets curve, which is about income inequality rather than pollution.
• Being drawn to 'inverted V' because the curve peaks — a peak is not the same as a kink, and the EKC is drawn as a smooth curve.

UPPSC asks this as one-line definitional recall — the shape, the namesake, the two variables on the axes — while UPSC prefers to test the surrounding ideas: sustainable development, carrying capacity, green accounting and the growth-versus-environment trade-off.

• practice — not a real PYQ

  The original Kuznets curve, proposed in 1955, described the relationship between per capita income and

  • (a)income inequality
  • (b)air pollution
  • (c)the rate of unemployment
  • (d)population growth

  Answer(a) Income inequality — Simon Kuznets hypothesised that inequality first widens and then narrows as an economy develops, an inverted U that the environmental version later borrowed.

• practice — not a real PYQ

  The inverted-U relationship described by the Environmental Kuznets Curve is empirically best supported in the case of

  • (a)carbon dioxide emissions
  • (b)local air pollutants such as sulphur dioxide and particulate matter
  • (c)municipal solid waste generation
  • (d)loss of biodiversity

  Answer(b) Local air pollutants such as sulphur dioxide and particulate matter — their damage is felt locally and is cheap to abate, so richer societies regulate them early; carbon dioxide, waste and biodiversity loss show a much weaker downturn or none at all.