Environment, Ecology and Climate

Air pollution and noise

School-level science literacy; first systematic UPSC environment preparation. Physical climate, soils and biome-location knowledge are studied in Geography.

Includes

• Assigned sections and concise recall notes
• Available mapped practice and analysis of mistakes
• One initial closed-book review

Separate time needed

• Later spaced revisions
• Full mock papers
• Ongoing changes in laws, treaties, species status and protected-area lists
• Detailed specialist biology or environmental engineering

Editorial planning estimate; not learner timing data

• NIOS Environmental Science, lesson 10: Environmental Pollution ↗

  Sections 10.1–10.3

• NIOS Environmental Science, lesson 10: Environmental Pollution ↗

  Section 10.3; control-device principles, not dated legal standards

• NIOS Environmental Science, lesson 14: Global Environmental Issues ↗

  Section 14.6

• NIOS Environmental Science, lesson 10: Environmental Pollution ↗

  Section 10.6; omit dated legal limits

• WHO Global Air Quality Guidelines: questions and answers, 22 September 2021 ↗

  WHO questions and answers, 22 September 2021: What are the WHO Global Air Quality Guidelines?; What is new in these guidelines? including the 2005/2021 comparison image and its averaging-time/99th-percentile footnotes; What is air pollution and where are these pollutants found in daily life?; final paragraph of How were the recommended AQG levels determined? on mixtures; How can these guidelines be used?; What is the difference between AQG levels, interim targets and good practice statements? Exclude dated global mortality totals, scenario forecasts, COVID claims and interpreting guideline values as zero-risk thresholds or binding national law.

• National Air Quality Index: design and interpretation ↗

  Opening explanation and eight-pollutant list; six category names; Construction of the AQI: worst-sub-index principle, pollutant availability requirement and averaging-time paragraphs. Exclude the erroneous worked arithmetic and interpolating formula, old city/database totals, launch-date claims, numerical breakpoint tables and the statement equating one station with a whole city. Interpret a reported index for its monitored location and period, not personal exposure or unmeasured pollutants.

• Government launches National Clean Air Programme: 10 January 2019 ↗

  10 January 2019 launch release: collaborative approach; original target/baseline; overall objective; multi-scale coordination; city action plans; final paragraph beginning Other features. Exclude city list, speaker praise and unsupported urban GDP/emissions figures. Original 20–30% PM2.5/PM10 reduction by 2024 against 2017 is historical policy, not a future/current target.

• National Clean Air Programme target revision: parliamentary reply, 28 November 2024 ↗

  28 November 2024 parliamentary reply: first paragraph (revised PM10 target) and second paragraph (convergence). Original programme and revised up-to-40% reduction or national-standard attainment by 2025–26 must be dated. The deadline is past at this review; no claim of renewal or target achievement. Exclude annexed city values and financing totals.

• National Clean Air Programme: parliamentary reply, 24 July 2025 ↗

  24 July 2025 parliamentary reply: opening two paragraphs on source-specific plans, convergence and performance incentives; paragraph on multilevel committees; annual-plan review paragraph; PRANA paragraph. Exclude city/funding totals, allocation formulas, the five-activity expenditure instruction and thermal-plant SO2 compliance claims.

• Impact of National Clean Air Programme on PM2.5 levels: parliamentary reply, 23 July 2026 ↗

  23 July 2026 parliamentary reply: NAAQS/AQI distinction paragraph, NCAP source-specific/state-plan paragraph, performance-incentive purpose and CAQM mandate paragraph. Progress paragraphs can illustrate that relative reductions and absolute national-standard attainment are different metrics; no city counts/values or causal evaluation are assigned. Exclude blanket international-comparability statement and treating reported improvement as proof of programme causation.

• Central Pollution Control Board: introduction and functions ↗

  Introduction: first paragraph on statutory establishment under the Water Act 1974 and Air Act 1981 functions; Principal Functions paragraph; NAMP purpose paragraph. Exclude old monitoring-station inventory, river counts and generalisations about all Indian rivers.