Reason (R): NbS frameworks link ecosystem degradation with fiscal instability, climate vulnerability, and long-term economic risk.
Which one of the following is correct?
Assertion – Correct: Nature-based Solutions treat ecosystems as instruments of climate resilience, economic stability and disaster risk reduction, not merely as conservation targets.
Reason – Correct: Ecosystem degradation is linked with fiscal stress, climate vulnerability and economic losses, which is why NbS is framed as a risk-management strategy.
Link: The Reason correctly explains why NbS represents a paradigm shift from traditional conservation.
Different industrial sectors emit greenhouse gases from fundamentally different stages of production.
Some sectors are dominated by process emissions.
Others are dominated by electricity-related emissions.
Therefore, the sequence and choice of decarbonisation measures must differ.
Core Logic: The determining constraint is the dominant emission source, not market structure, labour use, or demand patterns.
Why other options are wrong:
(a) Market structure does not determine emission chemistry.
(b) Demand size does not change emission pathways.
(d) Labour intensity has no bearing on emission origin.
Structural Context: India’s heavy water reactor programme is technologically mature, but global nuclear trade, vendor ecosystems, component standards, and fuel logistics are overwhelmingly centred on Light Water Reactor (LWR) platforms.
System Constraint: Without domestic capability in the globally dominant architecture, Indian firms cannot integrate into international nuclear supply chains or participate in reactor exports.
Core Logic: Hence, the driving constraint is market architecture compatibility, not any technical limitation of PHWRs.
Why other options are wrong:
(a) PHWRs also use imported fuel where required.
(c) India already operates 700 MWe PHWRs.
(d) Safety is not the structural reason cited for the LWR shift.
Structural Role: The SHANTI Act does not change reactor physics or fuel chemistry.
Systemic Function: Its primary role is to open the sector to private and foreign-linked activity, enabling component manufacturing, reactor exports, and global vendor participation.
Core Logic: Thus, it functions as an institutional bridge between India’s nuclear sector and the dominant global LWR ecosystem — just as wetlands function as filters, not water sources.
Why others are wrong:
(a) It does not replace reactor technology.
(c) It does not diversify energy sources.
(d) Cost effects are secondary, not its systemic role.
Core Function: FBRs are designed to produce more fissile material than they consume.
Fuel Conversion: They convert U-238 → Pu-239 and enable the thorium cycle by supplying starter material.
System Logic: Thus, their systemic role is fuel multiplication, not merely power generation.
Why others are wrong:
(a) Energy is a by-product, not the system purpose.
(c) Waste reduction is not the design objective.
(d) They do not diversify power sources.