Smog and Acid Rain — Prelims Strategy
Prelims Strategy
To tackle Smog and Acid Rain effectively for Prelims, aspirants should prioritize conceptual clarity and factual accuracy. Begin by thoroughly understanding the scientific mechanisms: the distinct formation processes of photochemical and sulfurous smog, the chemical reactions involved in acid rain (SO2/NOx to H2SO4/HNO3), and the role of meteorological factors like thermal inversion.
Memorize key precursor pollutants (SO2, NOx, VOCs) and their primary sources. Pay close attention to numerical data, such as the pH range for acid rain (below 5.6) and the target reduction percentages of the National Clean Air Programme (NCAP).
Familiarize yourself with the key provisions and objectives of relevant Indian legislations like the Air Act 1981, EPA 1986, and the specifics of BS-VI emission norms. Current affairs related to major smog events (e.
g., Delhi's winter crisis), new policy announcements, or significant court judgments (e.g., M.C. Mehta cases) are high-yield areas. Practice MCQs that test your ability to differentiate between similar concepts (e.
g., smog vs. fog, photochemical vs. sulfurous smog) and apply your knowledge to specific Indian contexts. Vyyuha's approach emphasizes creating flashcards for chemical formulas, policy names, and their key features to aid quick recall.