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IIT Delhi Study: Mitigating SO2 Emissions Could Prevent 1.24 Lakh Annual Deaths, Urges Strict FGD Implementation

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link
06 May 2026
~2 min
Source: Indian Express
Key Data:1,24,564 deaths annuallyDec 7, 2015July 11, 20252.36 to 5.05 thousand kilotonnes/year (2005-2021)80% reduction by 2030
Bodies:IIT DelhiMinistry of Environment, Forest and Climate ChangeCentre for Research on Energy and Clean Air
Practice MCQs from today's news ▸
What This Article Covers

1.A study by IIT Delhi, published in Nature, estimates that complete mitigation of SO2 from coal power plants could prevent 1,24,564 deaths annually in India.

2.The study links SO2 emissions to secondary PM2.5 formation and highlights the disproportionate health benefits for vulnerable groups (OBC, SC, ST) and states like Maharashtra, Tamil Nadu, and Karnataka.

3.This research strengthens the case for stricter enforcement of the 2015 emission norms and wider adoption of FGD systems, framing SO2 mitigation as an issue of environmental equity.

The Big Picture
Prelims · HighMains · High

A landmark IIT Delhi study published in Nature quantifies that fully mitigating sulphur dioxide emissions from coal-fired power plants could prevent over 1.24 lakh deaths annually in India. This highlights a critical environmental and public health issue with significant policy implications, especially regarding the implementation of Flue Gas Desulphurisation (FGD) technology and the 2015 emission norms.

Exam Lens

Quick Exam Facts From News

Annual Deaths Preventable1,24,564
Publication JournalNature
Key Technology MentionedFlue Gas Desulphurisation (FGD)
2015 Norms AnnouncedDecember 7, 2015
2025 Norms RelaxationJuly 11, 2025
States with Highest Avoidable DeathsMaharashtra, Tamil Nadu, Karnataka

1-Minute Revision

  • ›Annual Deaths Preventable: 1,24,564
  • ›Publication Journal: Nature
  • ›Target this Data: 1,24,564 annual preventable deaths from SO2 mitigation.
  • ›Target this Nodal Body: Ministry of Environment, Forest and Climate Change (MoEFCC) - responsible for 2015 emission norms.
  • ›Target this Legal Point: The 2015 emission norms for thermal power plants (announced Dec 7, 2015) and their 2025 relaxation (July 11, 2025).

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Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

Which ministry introduced the mandatory emission norms for coal-fired power plants in 2015, as discussed in the article?

Q2Statement-basedHard

Consider the following statements regarding the IIT Delhi study on SO2 emissions:

1. The study found that complete mitigation of SO2 could prevent over 1.24 lakh deaths annually, including specific numbers of cardiovascular and respiratory deaths.

2. According to the study, the benefits of SO2 mitigation would be evenly distributed across all income and social groups.

3. The research was published in the journal 'Nature' and used the 'Global Burden of Disease' framework for health impact estimation.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the IIT Delhi study cited in the article, what is the estimated number of annual deaths that could be prevented by fully mitigating SO2 emissions from coal-fired power plants in India?

Q4Application/ImpactMedium

What is a key argument presented in the IIT Delhi study to counter the opposition to installing Flue Gas Desulphurisation (FGD) systems in Indian power plants?

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