Consider the following:1. Carbon monoxide2. Methane3. Ozone4. Sulphur dioxideWhich of the above are released into the atmosphere due to the burning of crop/biomass residue?
✓ Correct answer: d) 1, 2, 3 and 4
ExplanationBurning stubble (parali) is the process of removing crop residue from the field in order to prepare it for the next crop.Open stubble burning releases a lot of harmful pollutants into the air, including smoke, particles, greenhouse gases (CO2, N2O, O3 CH4), air pollutants (CO, NH3, NOx, SO2, NMHC), and volatile organic compounds.These pollutants are dangerous to human health.Husk burning reduces the fertility of the soil by destroying its nutrients.When stubble burns, heat is produced that permeates the soil, causing the loss of moisture and benefi- cial microbes.SUPER HINT You can try, The "NOT" approach for all statements, this tests the improbability of negating a statement—if de- nying its impact seems highly unlikely, the statement is plausibly true.For Example: CO or O3 are NOT released in crop burning?Absurd, unlikely.UPSC GS Paper-I PYQs 490 81
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