Question 1
Read the given passage and answer the questions that follow.
When a technology lets us do more with less, the instinctive conclusion is that we will end up using less. In 1865 the English economist William Stanley Jevons questioned this comfortable assumption. He observed that more efficient steam engines had made coal cheaper to use, and he argued that Britain's appetite for coal would grow rather than shrink, because every new saving opened fresh uses for the fuel. The idea, now known as the rebound effect, has lost none of its sting.
Consider a farmer who switches from flood irrigation to drip lines. Each acre now needs far less water, and policymakers naturally record the difference as water saved. Yet the farmer finds that the same well can now irrigate more land. He may extend cultivation to fallow plots or shift to a thirstier, more profitable crop. The aquifer beneath the village is then drawn down as quickly as before, perhaps faster. The efficiency was real; the conservation was imagined.
None of this means that efficiency is a mistake. A family that buys an LED bulb rarely leaves the lights burning all night simply because the bill has fallen. In many such cases the rebound is small and most of the saving holds. The point is subtler: efficiency changes the cost of using a resource, and people respond to costs. Whether total consumption falls depends on how strongly demand reacts, and that cannot be read off an engineering diagram.
The lesson for policy is therefore not to abandon efficiency but to stop treating it as a substitute for limits. Subsidising drip irrigation while leaving groundwater extraction unmeasured is like widening a road and expecting traffic to thin out. Where a resource is genuinely scarce, gains in efficiency need to be paired with a cap, a price or a shared rule that keeps the freed-up quantity from simply being consumed elsewhere. Such rules can be agreed upon by village communities themselves; they need not be dictated from distant capitals.
Efficiency, in short, is a tool and not a destination. It hands us a choice: to bank the saving or to spend it. Societies that forget they are making that choice tend to spend it without noticing.
In the context of the passage, the phrase "has lost none of its sting" most nearly means that the idea



