Reading Lab

IELTS Academic Reading Practice Pack 16

A premium Academic Reading set on desalination, attention residue, and copper bottlenecks in the energy transition.

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60 min

Passages

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Passage 1

Desalination and the New Politics of Urban Water

Why desalination has re-entered city water planning, and why its appeal lies as much in timing and security as in raw supply.

A.A. Desalination plants used to be discussed mainly as symbols of engineering excess: expensive, energy-hungry facilities built by water-scarce states with few alternatives. That image has not disappeared, but the politics around the technology have shifted. Cities facing prolonged drought now talk less about whether desalination is elegant and more about whether it offers insurance against hydrological volatility. In such debates, the question is rarely whether desalinated water will become the entire urban supply. The question is whether a city under climate stress can afford to depend only on rainfall, reservoirs, and politically contested transfers from elsewhere. As climate variability lengthens planning horizons, the technology is increasingly evaluated as an instrument of urban resilience rather than as a prestige project built for exceptional conditions alone.

B.B. The attraction lies partly in predictability. Reservoirs depend on seasons that can now fail, and rivers crossing administrative borders are vulnerable to both drought and argument. A desalination plant, by contrast, seems to promise output that is detached from local rainfall. That promise is politically powerful because urban utilities are judged not by abstract hydrology but by whether taps keep running during visible crisis. Yet the apparent independence can mislead. Desalination may reduce reliance on rainfall, but it can increase reliance on electricity prices, coastal infrastructure, membranes, and intake systems that require constant technical oversight.

C.C. Cost comparisons are also less straightforward than they first appear. Critics often cite the high price of desalinated water relative to conventional surface supply, and in narrow accounting terms they are usually right. Supporters respond that emergency scarcity has a price too, even if it is often hidden until restrictions, crop loss, industrial disruption, or political backlash make it impossible to ignore. The disagreement is therefore not simply over arithmetic. It is over which costs count and when they are counted. Water that looks expensive in wet years can appear differently when planners are asked to price the consequences of running short in dry ones.

D.D. Energy remains the technology's most persistent vulnerability. Modern membranes have become more efficient, and some plants are paired with renewable electricity or flexible operating schedules. Even so, desalination converts water insecurity into a partly energy-based dependence. If power is carbon-intensive, the climate logic weakens. If electricity is cheap at some hours and expensive at others, the plant's economics become intertwined with grid management rather than with hydrology alone. The issue is not that desalination always undermines climate policy. It is that water resilience purchased through one system can shift stress into another unless both are planned together.

E.E. Environmental objections have evolved as well. Earlier debate often treated desalination as if seawater intake and brine discharge were either catastrophic by definition or too local to matter. In practice, impacts vary with site, dilution design, and monitoring discipline. Marine ecosystems near outfalls can be affected, especially where circulation is weak, but the scale is not fixed in advance. This makes the politics more difficult, not easier. Opponents cannot rely only on broad symbolism, and advocates cannot claim that technical compliance automatically resolves ecological concern. The argument moves from slogan to site-specific governance, where evidence matters but trust matters too.

F.F. Perhaps the most important change is institutional. Desalination is now more often discussed as one component of diversified supply portfolios that also include demand reduction, wastewater recycling, leakage control, and stormwater capture. That framing is crucial because the technology performs badly when sold as a magical substitute for conservation. Utilities that promise abundance may weaken public support for efficiency measures, only to discover later that desalination is too expensive to justify careless use. By contrast, when the plant is treated as a strategic buffer within a broader system, its role becomes narrower but more defensible.

G.G. Desalination's real political value, then, may lie in what it reveals about contemporary urban planning. Cities are being forced to choose not between perfect and flawed water sources, but between imperfect combinations with different risk profiles. The technology appeals to decision-makers because it offers visible infrastructure and a language of control. Its critics matter because they ask what kinds of dependency and ecological trade-off that control conceals. The mature question is no longer whether desalination is inherently good or bad. It is which cities can justify it, under what energy conditions, and as part of what wider water strategy.

Matching Headings

Questions 1-5

Choose the correct heading for paragraphs B-F from the list of headings below.

Write the correct Roman numeral, i-viii, in boxes 1-5.

1. Paragraph B

i. Why apparent independence can conceal a new dependency chain
ii. The argument that desalination makes conservation obsolete
iii. How wet-year accounting can distort long-term planning
iv. A site-specific environmental debate that resists slogans
v. Why energy planning and water planning cannot be separated
vi. The claim that reservoirs are politically irrelevant
vii. A diversified strategy in which the technology has a limited role
viii. Why cities no longer need cross-border water arrangements

2. Paragraph C

i. Why apparent independence can conceal a new dependency chain
ii. The argument that desalination makes conservation obsolete
iii. How wet-year accounting can distort long-term planning
iv. A site-specific environmental debate that resists slogans
v. Why energy planning and water planning cannot be separated
vi. The claim that reservoirs are politically irrelevant
vii. A diversified strategy in which the technology has a limited role
viii. Why cities no longer need cross-border water arrangements

3. Paragraph D

i. Why apparent independence can conceal a new dependency chain
ii. The argument that desalination makes conservation obsolete
iii. How wet-year accounting can distort long-term planning
iv. A site-specific environmental debate that resists slogans
v. Why energy planning and water planning cannot be separated
vi. The claim that reservoirs are politically irrelevant
vii. A diversified strategy in which the technology has a limited role
viii. Why cities no longer need cross-border water arrangements

4. Paragraph E

i. Why apparent independence can conceal a new dependency chain
ii. The argument that desalination makes conservation obsolete
iii. How wet-year accounting can distort long-term planning
iv. A site-specific environmental debate that resists slogans
v. Why energy planning and water planning cannot be separated
vi. The claim that reservoirs are politically irrelevant
vii. A diversified strategy in which the technology has a limited role
viii. Why cities no longer need cross-border water arrangements

5. Paragraph F

i. Why apparent independence can conceal a new dependency chain
ii. The argument that desalination makes conservation obsolete
iii. How wet-year accounting can distort long-term planning
iv. A site-specific environmental debate that resists slogans
v. Why energy planning and water planning cannot be separated
vi. The claim that reservoirs are politically irrelevant
vii. A diversified strategy in which the technology has a limited role
viii. Why cities no longer need cross-border water arrangements

True/False/Not Given

Questions 6-9

Do the following statements agree with the information given in Reading Passage 1?

In boxes 6-9, write TRUE if the statement agrees with the information, FALSE if the statement contradicts the information, or NOT GIVEN if there is no information on this.

6. The passage says desalination is now usually planned as the only reliable urban water source.

7. The writer suggests that the cost argument depends partly on when scarcity costs are recognised.

8. The passage states that every desalination outfall causes severe marine damage.

9. The writer says public trust has become irrelevant once monitoring data are available.

Sentence Completion

Questions 10-13

Complete the sentences below.

Choose ONE WORD ONLY from the passage for each answer.

10. A desalination plant may reduce reliance on rainfall while increasing reliance on coastal ______.

11. Some supporters and critics disagree less about arithmetic than about which ______ should be counted.

12. If electricity is carbon-intensive, the climate ______ for desalination becomes weaker.

13. The writer argues that cities now choose between imperfect combinations with different risk ______.

Passage 2

Attention Residue and the Fragmentation of Knowledge Work

Why switching between tasks carries a cognitive cost, and why modern workplaces often confuse visible responsiveness with effective concentration.

A.A. Modern offices often celebrate responsiveness. A worker who replies quickly, attends many channels, and moves fluidly between tasks can appear highly engaged. Yet research on attention suggests that this style of performance carries hidden cognitive friction. When people leave one demanding task and turn to another, part of their mind can remain attached to what they have just left. That lingering pull is sometimes described as attention residue. The term matters because it shifts the problem away from simple busyness. The issue is not that people are active. It is that fragments of unfinished cognitive work travel with them and dilute what comes next.

B.B. This is most visible in knowledge work that depends on interpretation rather than routine repetition. Drafting, analysis, coding, design, and planning often require a worker to hold a structured mental model in place for long enough to test possibilities and reject distractions. If interruptions arrive before that model stabilises, resumption is not costless. People may re-read material, retrace earlier assumptions, or resume at a shallower level than before. Short tasks can therefore create disproportionately large losses when they puncture a more complex one. What looks like a five-minute interruption on a calendar may expand into a much longer recovery period in cognitive terms.

C.C. The workplace misunderstanding begins when managers measure the wrong thing. Digital systems make responsiveness visible: message counts, ticket closures, meeting attendance, or rapid acknowledgement of requests. Deep concentration is less easily seen and often becomes legible only through slower outputs whose value is harder to quantify in real time. In organisations under coordination pressure, the visible metric frequently wins. This does not happen because managers are irrational. It happens because throughput signals are easier to monitor than mental quality, and because delays caused by fragmentation are usually distributed quietly across a day rather than reported as dramatic failures.

D.D. That does not mean every interruption is harmful. Some tasks genuinely benefit from rapid communication, and some teams depend on quick handovers to prevent more serious delay later. The stronger claim is narrower: interruption should be treated as a design choice with uneven cost, not as a neutral background condition. A junior employee managing customer complaints may need a different communication rhythm from a scientist writing an analysis memorandum. Problems arise when one norm of constant availability is imposed across roles whose cognitive structures are very different. Under those conditions, flexibility becomes a slogan that hides standardisation.

E.E. Software vendors have responded by promising technical solutions: focus modes, batching tools, notification filters, and dashboard settings that aim to defend blocks of concentration. These tools can help, but their value depends on norms around them. A worker cannot meaningfully use a focus setting if colleagues treat delayed replies as evidence of disengagement. Nor can software fix a staffing model built around under-resourced teams for whom every message feels urgent. The technology therefore works best as an amplifier of shared agreement, not as a substitute for it. Without institutional permission to be temporarily unavailable, the interface merely decorates the problem.

F.F. Workers themselves are often ambivalent. Many complain about interruption while also participating in it, partly because fast responses can generate short-term relief. Answering now removes one item from immediate awareness, even if it disrupts something more important. There is also a social dimension: delayed replies may feel risky in competitive workplaces where visibility is tied to security or advancement. This helps explain why advice about personal discipline often disappoints. Individuals may understand the cost of fragmentation perfectly well and still behave in fragmented ways because the surrounding incentives reward signalling presence over protecting thought.

G.G. The policy implication is not that everyone should retreat into silence. Organisations still need coordination, escalation paths, and moments of shared attention. The challenge is to distinguish communication that is truly time-sensitive from communication that has merely become culturally accelerated. Some firms now create no-meeting windows, asynchronous defaults, or explicit response-time categories to reduce unnecessary switching. Such policies work best when leaders follow them too. If senior staff praise concentration in principle while rewarding instant response in practice, workers will trust the incentives rather than the memo.

H.H. Attention residue is therefore useful less as a fashionable label than as a corrective to a persistent managerial illusion. It reminds organisations that cognition has after-effects and that context switching is not an empty space between tasks. Every system that fragments thought in the name of flexibility is making a trade-off, whether it admits it or not. The serious question is not whether communication matters. It is which forms of communication justify the cognitive tax they impose, on whom, and how often.

Matching Information

Questions 14-17

Which paragraph contains the following information?

Write the correct letter, A-H, in boxes 14-17.

You may use any letter more than once.

14. a point that visible digital measures are easier to monitor than mental quality

15. an explanation of why short interruptions can create much longer losses

16. a warning that technical features depend on social permission to work

17. the claim that policy is only credible if leaders accept its consequences themselves

Matching Features

Questions 18-21

Look at the following groups of people and the list of statements below.

Match each statement with the correct group, A-D.

Write the correct letter, A-D, in boxes 18-21.

A. managers

B. software vendors

C. workers

D. senior staff

18. are described as often relying on indicators that are easy to observe

19. are said to provide tools that help only if workplace norms support them

20. may understand the problem but still reproduce it for strategic reasons

21. must model a policy if they want others to believe it

Multiple Choice

Questions 22-24

Choose the correct letter, A, B, C or D.

22. What is the main point of paragraph D? A. Interruptions are equally damaging in all roles. B. Some interruptions matter, but their costs differ across kinds of work. C. Junior employees are less harmed by interruptions than senior ones. D. Availability culture is mainly created by software design.

23. According to the passage, why does personal productivity advice often fail? A. Workers dislike new tools. B. Managers no longer care about output quality. C. People are rewarded for signalling presence even when it fragments work. D. Complex tasks have disappeared from most offices.

24. The writer's attitude to attention residue is that it A. has been exaggerated by academic psychologists. B. only matters in highly technical professions. C. is useful because it exposes a hidden trade-off in workplace design. D. can be solved once employees become more disciplined.

Summary Completion

Questions 25-27

Complete the summary below.

Choose ONE WORD ONLY from the passage for each answer.

25. Attention residue refers to the cognitive pull of an unfinished task that continues after a worker has ______ to something else.

26. The passage argues that many offices privilege visible ______ over harder-to-measure concentration.

27. Tools such as notification filters are most effective when they support an existing organisational ______.

Passage 3

Copper and the Quiet Bottleneck of Electrification

Why copper demand is rising with electrification, and why the constraint is not only geology but timing, permitting, and refining capacity.

A.A. Copper rarely dominates public discussion of the energy transition, yet it sits inside many of its most visible technologies. Electric vehicles, transmission lines, transformers, charging systems, wind installations, and parts of the built environment all depend on large volumes of conductive material. This does not mean copper is uniquely irreplaceable in every application, but it does mean that electrification is materially denser than many decarbonisation slogans imply. A transition described in terms of clean power and smart systems is also a transition through mines, smelters, cables, and the long industrial chain required to move metal from ore body to grid asset.

B.B. Demand projections therefore attract intense attention, but they can mislead if read too mechanically. Some forecasts assume rapid vehicle uptake, major grid expansion, and accelerated renewable deployment; others expect substitution, efficiency gains, or slower build-out. The disagreement is not trivial, yet it can distract from a more important point: supply adjustment is slow even when demand uncertainty is high. Mines take years to permit and finance. Processing capacity is concentrated. Skilled labour and equipment cannot be expanded overnight. In other words, a market can become strategically tight even before anyone proves the highest forecast exactly right.

C.C. Geology is only part of the story. Public narratives often imply that scarcity begins where the Earth runs out of usable metal, but industrial bottlenecks usually appear earlier. Ore grades can decline, making extraction more expensive, yet permitting delays, local conflict, transport constraints, and refining bottlenecks may be equally decisive. A deposit that exists on paper is not the same thing as material available at scale for manufacturers on a politically relevant timetable. The transition debate becomes distorted when physical presence is confused with operational readiness.

D.D. Refining and smelting create a second layer of vulnerability because they are unevenly distributed. A country may possess ore resources and still remain exposed if intermediate processing is concentrated elsewhere. This matters for governments that increasingly describe energy supply chains in strategic terms rather than purely commercial ones. Dependence can shift from oil import routes to metal-processing capacity, from pipelines to industrial chemistry. The language of resource security survives, but its geography changes. What appears to be a mining question can turn into a manufacturing and trade question very quickly.

E.E. Recycling is frequently presented as the elegant answer. Over time, secondary supply will indeed matter more, especially as larger volumes of end-of-life equipment return to the system. But recycling cannot immediately satisfy every short-term surge in demand because much of the copper now being installed is intended to remain in service for decades. The circular solution therefore expands with delay. It reduces pressure over the long run, yet it does not erase the need for primary supply during a build-out phase when infrastructure is still accumulating rather than returning as scrap.

F.F. These timing problems have major policy implications. States that want rapid electrification may discover that climate ambition depends on ministries and permitting regimes that were not originally designed around industrial urgency. They may also find that local opposition to extraction, often grounded in real environmental concern, collides with national targets for clean energy deployment. This does not create a simple moral hierarchy in which mining automatically defeats conservation. It does, however, force governments to admit that material policy and climate policy are now intertwined rather than separable.

G.G. The copper story is therefore a lesson in delayed adjustment. Markets can recognise future need long before new capacity arrives, and political systems can endorse electrification long before they can coordinate the metal chain required to support it. The risk is not just higher prices. It is that strategic optimism outruns industrial sequencing. When that happens, the transition does not fail dramatically. It slows unevenly, with bottlenecks appearing in places that are less visible to the public than wind turbines or electric cars, but no less decisive for whether those symbols can be built at scale. That is why copper matters as a planning signal as well as a commodity: it reveals how ambitious energy narratives are tested by the slower institutions of extraction, permitting, trade, and industrial build-out. It also reminds policymakers that supply resilience is created through sequencing decisions years before shortage becomes a headline problem.

Yes/No/Not Given

Questions 28-31

Do the following statements agree with the views of the writer in Reading Passage 3?

In boxes 28-31, write YES if the statement agrees with the views of the writer, NO if the statement contradicts the views of the writer, or NOT GIVEN if it is impossible to say what the writer thinks about this.

28. The writer thinks public discussions of decarbonisation often understate its material requirements.

29. The writer believes supply concerns only become serious once the highest demand forecast is proven correct.

30. The writer says geological shortage is the only meaningful source of copper scarcity.

31. The writer sees recycling as helpful but insufficient to solve near-term pressure on its own.

Note Completion

Questions 32-33

Complete the notes below.

Choose ONE WORD ONLY from the passage for each answer.

32. Electrification depends on a long industrial chain from ore body to grid ______.

33. A deposit that exists physically may still lack operational ______.

Table Completion

Questions 34-35

Complete the table below.

Choose ONE WORD ONLY from the passage for each answer.

34. Cause of strategic exposure beyond mining: concentrated intermediate ______

35. Reason recycling cannot solve immediate demand spikes: much installed copper remains in ______ for decades

Flow-chart Completion

Questions 36-37

Complete the flow-chart below.

Choose ONE WORD ONLY from the passage for each answer.

36. Future need is recognised -> new mines face long permitting and ______ stages -> capacity arrives slowly

37. Climate targets expand -> metal policy and climate policy become increasingly ______

Diagram Labelling

Questions 38-39

Label the diagram below.

Choose ONE WORD ONLY from the passage for each answer.

38. Stage between mining and manufacturing highlighted by the writer: ______

39. Publicly visible transition symbol contrasted with hidden bottlenecks: electric ______

Short-answer Questions

Question 40

Answer the question below.

Choose NO MORE THAN TWO WORDS from the passage for your answer.

40. What can strategic optimism outrun, according to the final paragraph?