IELTS Academic Reading Practice Test 36

A The leaf of the evergreen shrub Camellia sinensis has been consumed in China for at least three thousand years, originally as a medicinal preparation and only gradually as a household drink. Domestic tea cultivation appears to have largely expanded under the Tang dynasty during the seventh century, by which time tea-houses had become a regular feature of Chinese urban life. Lu Yu's classic treatise The Classic of Tea, written around 760 CE, is said to have codified harvesting, processing, and brewing methods that were still recognisable a thousand years later. By the late sixteenth century, when European merchant ships first reached Chinese ports in significant numbers, tea-drinking was already a deeply rooted cultural and economic practice across East Asia.

B Tea arrived in Europe through Dutch, rather than Portuguese, hands. The Dutch East India Company shipped its first commercial cargo of green tea from Macao to Amsterdam in 1610, and although the new beverage was initially regarded as an expensive curiosity, demand grew rapidly across the Netherlands and northern Germany. The drink reached England in the 1650s, where it was first served at Garraway's coffee-house in London at the staggering price of more than ten pounds per pound weight. Within a generation, however, falling import prices and the marriage of King Charles II to the Portuguese tea-drinking princess Catherine of Braganza had made the beverage fashionable in court circles, and by 1700 some five hundred London establishments advertised tea on their premises.

C The eighteenth-century expansion of British tea consumption is widely held to have posed a structural problem for international trade. Chinese merchants accepted essentially nothing from Europe in exchange — they were uninterested in European cloth, metalwork, or manufactures — and demanded payment almost entirely in silver bullion. The resulting drain of silver from European treasuries became politically alarming. The British East India Company eventually contrived a notorious solution: opium, cultivated in British-controlled Bengal, smuggled into Chinese ports despite an imperial ban, and exchanged for the tea and porcelain that Britain wished to import. The Opium Wars of 1839-1842 and 1856-1860, fought largely in defence of this trade, forced Chinese ports open on British terms and remain arguably among the most disreputable episodes in the history of European commerce.

D British anxiety about dependence on Chinese tea also drove a campaign to establish plantation production within the British Empire. In 1823, the Scottish soldier Robert Bruce is recorded to have observed native tea plants growing wild in Assam, in north-eastern India. After roughly two decades of experimentation, the Assam Company opened the first commercial tea plantation outside China in 1839. Tea cultivation in Ceylon, now Sri Lanka, began on a serious scale in the 1860s after a coffee blight devastated the colony's previous staple crop. By the 1880s, Indian and Ceylonese tea had largely displaced Chinese tea in the British market, and by 1910 the British Empire accounted for the great majority of the world's commercial tea exports.

E The journey from a tea estate to a European cup involved an extraordinary logistical chain. The famous clipper ships of the mid-nineteenth century — including the Cutty Sark, largely launched in 1869 and now preserved in Greenwich — were designed specifically to carry the first new-season tea from Asian ports to London as quickly as possible, since freshness commanded premium prices. The annual tea race from Foochow attracted public attention reportedly comparable to a major sporting event. The opening of the Suez Canal in 1869, paradoxically the same year the Cutty Sark was launched, doomed the clipper trade: steamships could pass through the canal whereas sailing vessels could not, and a steamer using the new route could deliver tea to London weeks faster than the fastest clipper sailing around the Cape of Good Hope.

F Tea became, in many of its consuming countries, far more than merely a beverage. The British developed elaborate domestic rituals of afternoon tea, popularly attributed to the seventh Duchess of Bedford in the 1840s, while tea-rooms became important social spaces — particularly for middle-class women whose access to coffee-houses was restricted. The mass production of cheap tea after 1880 turned the drink into a working-class staple, and per-capita British consumption peaked at over four kilograms of dry leaf per person per year shortly after the First World War. The economics of contemporary tea remains substantial, with global production exceeding six million tonnes annually and major industries dependent on the crop in countries from Kenya to Vietnam. Yet a question that troubled eighteenth-century moralists has not gone away: a luxury that began as a remedy in Chinese pharmacies has become, in many places, a daily commodity, and the question of how much of any given cup's price actually reaches the people who picked the leaves remains a vivid concern of fair-trade advocates today.

A A modern battery-electric vehicle looks, from the outside, like a familiar object — four wheels, a passenger cabin, a steering column — but its supply chain bears almost no resemblance to that of the internal combustion engine it is increasingly replacing. The traditional automotive industry was assembled around the demands of steel and aluminium, processed petroleum, and a comparatively small number of high-tolerance moving parts. The electric vehicle, by contrast, depends fundamentally on a battery pack that may account for a third or more of the finished cost of the car, and on a globally dispersed network of mines, refineries, and component factories supplying the materials of that battery. Understanding the supply chain of the electric vehicle has therefore arguably become essential not only to industry analysts but also to governments concerned with industrial strategy and energy security.

B The battery is widely held to be the heart of the supply chain. A typical electric-vehicle battery pack today uses lithium-ion cells in which the cathode — the positive electrode — accounts for the bulk of the materials cost. Two dominant cathode chemistries are in widespread commercial use: NMC, an acronym for the combination of nickel, manganese, and cobalt, and LFP, which uses lithium iron phosphate. NMC offers higher energy density and therefore longer driving range, while LFP is cheaper, longer-lived in deep-cycle use, and contains no cobalt — a particularly contested material whose supply is largely concentrated in the Democratic Republic of the Congo. The choice between chemistries has profound consequences for both the vehicle's cost structure and the geopolitics of the supply chain.

C Mining is the first stage of the chain. Lithium is extracted either from hard-rock mines, principally in Australia, or from brines pumped from beneath salt flats in the so-called Lithium Triangle of Argentina, Bolivia, and Chile. Cobalt comes overwhelmingly from artisanal and industrial mines in the Democratic Republic of the Congo, while nickel for battery use is largely concentrated in Indonesia, the Philippines, and Russia. Australia, China, and several African states generally dominate the supply of natural graphite used in battery anodes. Few of these countries also possess significant refining capacity, however, and this is where the next pinch point of the supply chain lies.

D Refining and chemical processing have become the most concentrated stage. According to data from the International Energy Agency, China processes more than seventy percent of the world's lithium, sixty-five percent of its cobalt, and ninety percent of natural graphite destined for battery use. Even ores mined in Australia, Indonesia, or Africa are most often shipped to Chinese refineries for the production of the battery-grade chemicals required by cell makers. This concentration broadly arose for reasons of cost, regulatory speed, and decades of sustained Chinese state investment, and its persistence has driven recent industrial policies in Europe and North America aimed at building domestic refining capacity. The United States Inflation Reduction Act of 2022 and the European Union's Critical Raw Materials Act of 2024 both contain explicit incentives for the relocation of refining and battery manufacturing.

E Cell manufacture is the most capital-intensive stage of the chain. A modern gigafactory costs between four and seven billion dollars to build and requires reliable supplies of electricity, ultra-pure water, and trained technicians. China currently hosts the majority of the world's installed cell-manufacturing capacity, but South Korean and Japanese firms — including Samsung SDI, LG Energy Solution, and Panasonic — have substantial operations and have invested heavily in joint ventures with American and European carmakers. The location of cell factories shapes downstream patterns of vehicle assembly because batteries are heavy, hazardous to ship, and expensive to transport over long distances; vehicle plants tend to cluster within a few hundred kilometres of their cell suppliers.

F The supply chain has been forced to confront awkward questions of labour and environment. Cobalt mining in the Congo has been documented to involve significant artisanal workings, including the involvement of children, and reform efforts led by both industry consortia and the Congolese government have made progress but have not eliminated the problem. Lithium extraction from brines consumes substantial quantities of water in some of the driest regions on earth, raising concerns among indigenous communities in northern Chile and southern Bolivia. Nickel laterite mining in Indonesia has cleared significant areas of tropical forest and produced contentious greenhouse-gas emissions. Battery recycling, an increasingly important closing of the loop, is technically promising but is currently economic for only a small fraction of end-of-life batteries because the chemical separation of recovered materials remains expensive.

G Several developments may reshape the chain over the next decade. Sodium-ion batteries, which substitute the more abundant and cheaper element sodium for lithium, have begun limited commercial deployment in entry-level electric vehicles and stationary storage; if their energy density continues to improve, they could relieve some of the dependence on lithium and cobalt entirely. Solid-state batteries, with no liquid electrolyte, broadly promise higher energy density and lower fire risk but have proved persistently difficult to manufacture at scale. The development of dry-electrode coating techniques, recycling facilities that recover lithium and nickel at over ninety-five percent efficiency, and direct-from-brine extraction methods could collectively redraw the map of the industry. Whether they will do so before, or only after, demand for electric vehicles outstrips the supply of refined materials is the central uncertainty hanging over an industry already valued in the hundreds of billions of dollars.

A On 24 August 79 CE — or, on a revised reading of recent evidence, on a date some weeks later in the autumn — the Roman volcano Vesuvius is reported to have produced one of the most catastrophic eruptions in recorded history. The town of Pompeii, lying roughly eight kilometres to the south-east, was buried under between four and six metres of pumice, ash, and pyroclastic surge material in the space of less than two days. Roughly two thousand of the town's inhabitants are believed to have perished in the disaster, although many more must have fled in the early hours of the eruption. For more than fifteen hundred years thereafter the buried town was forgotten, marked on later maps only as a desolate hill known locally as La Civita.

B Pompeii was, it seems, rediscovered largely by accident. Workmen digging a water channel for the Bourbon king Charles III of Naples struck a Roman wall in 1748, and the king ordered systematic excavation to begin. The early decades of this work were closer to treasure-hunting than to archaeology in any modern sense. Frescoes, statues, and bronzes were detached from walls and taken to the royal palace at Portici without proper records of their original location. The eruption itself was understood largely through Pliny the Younger's two famous letters to the historian Tacitus, describing the volcanic plume as resembling a Mediterranean stone pine and recounting his own uncle's death at Stabiae. These letters remained the principal contemporary written source for the disaster.

C The first scientifically minded excavator is widely held to have been Giuseppe Fiorelli, appointed director of the Pompeii excavations in 1860 after the unification of Italy. Fiorelli imposed three lasting innovations on the discipline. First, he insisted on excavating each building stratigraphically and recording every find in its precise context. Second, he divided the town into numbered regions, blocks, and houses, the system used to locate any feature in Pompeii to the present day. Third — and most famously — he developed the technique of filling the cavities left in the hardened ash by decayed bodies with plaster of Paris. When the surrounding ash was excavated, the plaster cast preserved the shape of the original victim, sometimes in remarkably poignant detail. Fiorelli's first plaster casts were produced in 1863, and the technique has since yielded arguably some of the most evocative images in archaeology.

D The character of life in Pompeii has been reconstructed in remarkable detail from its buildings, contents, and inscriptions. Wall paintings broadly document the diet, dress, religious practices, and political life of the town. Bakers' shops have been excavated complete with carbonised loaves still in their ovens; a single wine bar apparently largely revealed eighty-three customers' graffiti scratched into its walls. Election notices painted in red along the main streets canvassed support for candidates whose names are otherwise unknown. The Lupanar, the town's principal brothel, contains arguably the most extensive surviving collection of Roman erotic frescoes; the Villa of the Mysteries, on the outskirts of the town, appears to display an enigmatic cycle of large-scale paintings whose subject — apparently a religious initiation rite — remains contested among scholars.

E Modern archaeology has, replaced the spectacle of the early excavations with more methodical strategies of conservation, partial excavation, and reburial. Roughly a third of the town remains underground, deliberately left for future generations who may possess techniques that we do not. Sara Bisel's 1980s study of skeletal remains from neighbouring Herculaneum — a coastal town buried by the same eruption — is regarded as the first detailed bio-archaeological portrait of a Roman urban population: their diet, height, dental health, and the diseases largely recorded in their bones. More recently, DNA analysis of recovered teeth has begun to clarify the ancestry of Pompeii's inhabitants, with results suggesting a population of remarkably mixed origin drawn from across the wider Mediterranean.

F The site is said to face severe modern threats. Collapses of unreinforced walls have been alarmingly frequent, including the high-profile fall of the Schola Armaturarum in 2010, which prompted UNESCO criticism and an emergency intervention by the European Union called the Great Pompeii Project. Between 2014 and 2022 this programme invested more than €100 million in conservation, consolidation, and limited new excavation. Tourist pressure on the site — at its peak running close to four million visitors annually — places further strain on fragile surfaces, while climate change has largely produced heavier rainfall events that have accelerated erosion. Balancing the demands of conservation with public access remains, it seems, the central administrative challenge of the modern site.

G Recent technologies have produced striking advances. Laser-scanning surveys, drone photogrammetry, and ground-penetrating radar now allow excavators to model the site's geometry and detect unexcavated structures without disturbing them. Multispectral imaging has revealed text invisible on charred papyri from neighbouring Herculaneum, and in 2024 a research team announced the first successful reading of several lines from a previously illegible scroll using machine-learning techniques applied to high-resolution scans. CT scanning of plaster casts has shown the skeletons inside, opening a new chapter of bio-archaeology that combines Fiorelli's nineteenth-century technique with twenty-first-century imaging.

H Pompeii has largely retained its hold on the public imagination not merely because of the dramatic manner of its destruction, but also, because of the granular ordinariness of what survives. Few other ancient sites appear to preserve so much of the texture of daily life: the still-stocked counter of a snack-bar, the inscriptions of schoolchildren on plastered walls, the perfectly preserved imprint of a wooden door in volcanic ash. Successive generations of archaeologists have read this evidence in successive ways, asking new questions of the same buried town. The site remains arguably a working laboratory for the discipline as a whole, and the gradual emergence of the unexcavated third may yet reshape our understanding of a Roman provincial town that we already know better, perhaps, than any other.