Exam reading practice test 4 | English Test Prep

Reading Passage 1

Why Cities Become Hotter

AOn a summer afternoon, a city can feel much hotter than the countryside around it. This difference is commonly called the urban heat island effect. It develops because towns and cities contain large areas of roofs, roads and pavements that absorb energy from the sun. Many of these surfaces store heat during the day and release it slowly after sunset. In a field or woodland, by contrast, plants provide shade and use some of the available energy to evaporate water. The result is not simply a difference in appearance: it can affect comfort, energy use, public health and the way people use streets and parks.

BThe materials used in buildings and streets are important, but they are not the only cause. Trees and other plants cool their surroundings by shading surfaces and releasing water vapour through a process known as transpiration. When a neighbourhood has few trees, sunlight reaches the ground and building walls more directly. Dark roofs and roads may then become particularly hot. Tall buildings can add another complication. Depending on their arrangement, they may block helpful breezes or reduce the amount of heat that escapes to the open sky at night. The shape of a street can therefore influence local temperatures as well as the materials used to construct it.

CHuman activity contributes to urban warmth too. Cars, industrial equipment, air conditioners and other machines release heat as they operate. Air conditioning makes indoor spaces more comfortable, but the heat removed from a building is usually released outside. When many buildings use cooling systems at the same time, the surrounding outdoor environment may become warmer. The electricity required to run these systems can also increase demand on power networks, particularly during a heatwave. If electricity is generated using fossil fuels, this demand can contribute indirectly to greenhouse-gas emissions, creating a connection between local heat management and the wider climate problem.

DNot every part of a city experiences the same conditions. A district with mature trees, parks and water may remain cooler than an industrial area with extensive paved surfaces. Even within one neighbourhood, a shaded pavement can be more comfortable than a nearby road exposed to direct sunlight. Researchers therefore distinguish between the temperature of a surface and the temperature of the air people breathe. Satellite images can reveal patterns across a large area, while instruments at street level can show how conditions vary where people actually walk, wait for buses or work outdoors. Both forms of evidence are useful, but they answer different questions.

EThe timing of heat matters as much as the highest temperature recorded. Buildings and roads may continue releasing stored energy well into the evening, preventing the air from cooling quickly. A sequence of hot nights can be especially difficult because the human body has less opportunity to recover from daytime stress. Indoor conditions also vary: a well-insulated building may keep heat out during the day, but a poorly ventilated home can remain uncomfortable after sunset. People who cannot afford air conditioning, live in crowded accommodation or work outside may face greater exposure than those who can choose when and where to spend their time.

FThe effects are not distributed equally. Older people, very young children and people with certain health conditions can be more vulnerable to extreme heat. Outdoor workers may have limited opportunities to rest, while residents in areas with little shade may need to walk farther to find a cool place. Heat can also affect concentration and sleep, with consequences for learning, productivity and general well-being. For city authorities, this means that temperature maps should be considered alongside information about housing, transport, income and access to public services. A plan that lowers the average temperature but leaves the most exposed residents without protection may fail to address the most serious risks.

GCities can respond in several ways, but no single intervention works everywhere. Planting trees can provide shade and cooling, although young trees need years of care and a reliable water supply. Green roofs may reduce the amount of heat absorbed by buildings, but their suitability depends on the structure and maintenance of each roof. Light-coloured surfaces reflect more sunlight than dark ones, though glare, local climate and material durability must also be considered. Public fountains and shaded shelters may improve comfort in particular locations. The best approach usually combines several measures and considers how they will work together over time.

HUrban heat is therefore not simply a technical problem that can be solved by choosing a new building material. It is connected to decisions about transport, housing, public space and the distribution of resources. A street redesigned to include trees and safe walking routes may provide shade while encouraging people to travel without a car. However, trees need room for roots, and new public spaces require long-term maintenance. Effective planning begins by identifying where heat creates the greatest risk, consulting the people who use those places and checking whether an intervention actually improves conditions. Cities cannot control the weather, but they can make the places where people live more resilient to it.

Reading Passage 2

Measuring the Heat

ABefore a city can decide where to act, it needs to understand how heat varies across its streets and neighbourhoods. A single reading from an airport weather station is unlikely to describe every part of a large urban area. The station may be surrounded by open ground, while nearby districts contain tall buildings, busy roads and little vegetation. Researchers therefore combine different sources of evidence. Satellite sensors can estimate the temperature of roofs, roads and other surfaces over a wide area. Street-level instruments measure the air temperature in places where residents spend time. Surveys and observations can add information about shade, building use and how people move through public space.

BThese measurements should not be treated as interchangeable. A surface can become extremely hot in direct sunlight even when the air a short distance above it is cooler. Conversely, a street may remain uncomfortable because warm air is trapped between buildings after the sun has gone down. Satellite data are useful for identifying broad patterns, but they do not automatically reveal what a pedestrian experiences at head height. Street instruments provide more direct evidence of local conditions, although the results depend on where the instruments are placed, how they are shielded from sunlight and how frequently they record readings.

CResearchers also need to consider time. A survey carried out at midday may identify a different set of hot locations from one conducted in the early evening. Weather conditions can change quickly, and a cloudy day may produce a different pattern from a clear one. To compare neighbourhoods fairly, investigators may need repeated measurements across several days and, where possible, across different seasons. This can be expensive, so researchers sometimes combine a smaller number of carefully chosen ground measurements with satellite information and computer models. The aim is not to collect the largest possible quantity of data, but to collect evidence suited to the decision being made.

DComputer models can help explain why a location becomes hot and estimate what might happen if its design changes. A model may compare a street with and without trees, or estimate how different roof materials affect heat absorption. Yet a model is only as useful as its assumptions. If it does not represent building height accurately or ignores the need to water young trees, its results may overstate the likely benefit of an intervention. Researchers should make assumptions clear and compare modelled outcomes with measurements from real places. A precise-looking result is not necessarily a reliable one if important features have been left out.

ETemperature is only one part of human heat exposure. Humidity affects how effectively sweat cools the body, while wind can make a shaded location more comfortable. The amount of time a person spends outside and the physical effort involved also matter. A delivery worker walking for several hours may face a different level of risk from someone waiting briefly at a bus stop, even if both experience the same air temperature. Researchers may therefore use measures that combine temperature with humidity or other environmental conditions. These measures can be more informative for public health, but they still cannot describe every person's circumstances.

FMaps can help authorities set priorities, but they can also hide differences within a district. An average reading may suggest that a neighbourhood is reasonably cool even if one housing block has no shade and very little ventilation. Researchers increasingly combine environmental information with social data, such as the location of care homes, schools, public transport stops and areas where residents have limited access to cooling. Using such information requires care: personal details should be protected, and a statistical pattern should not be used to label every individual in a group as vulnerable. The purpose is to identify where support may be needed, not to make assumptions about every resident.

GCommunity knowledge can improve the quality of measurement. Residents may know that a particular pavement becomes unbearable in late afternoon, that a bus shelter offers no shade at a certain time or that an indoor community centre remains cool during a heatwave. Such observations can help researchers choose where to place instruments and which questions to investigate. Local reports should not replace systematic measurements, because memory and perception can be affected by many factors. Instead, the two sources can be used together: instruments identify patterns, while residents help explain how those patterns affect daily life.

HGood heat measurement is not an end in itself. The purpose is to guide decisions and then test whether they work. If a city plants trees, it can compare conditions before and after planting, while allowing for differences in weather. It can also ask whether the shade is available where people need it and whether the trees survive. A successful project should be judged by more than the number of trees planted or the area of reflective roof installed. Monitoring helps authorities learn from results, adjust maintenance and direct future investment towards measures that provide the greatest practical benefit.

Reading Passage 3

Designing Cooler Neighbourhoods

AOnce a city has identified its hottest areas, planners face a practical question: which intervention should come first? Planting trees is often popular because trees offer shade, improve the appearance of streets and can support wildlife. However, planting is not simply a matter of putting young trees into the ground. Roots need sufficient space, underground pipes may limit where trees can grow, and young plants require water and care. In a dry climate, choosing species suited to local conditions is particularly important. A programme that counts the number of trees planted but fails to fund their maintenance may produce little long-term cooling.

BGreen roofs and walls can provide additional vegetation where ground space is limited. A green roof may reduce the amount of sunlight absorbed by a building and help manage rainwater, while a planted wall can shade part of a façade. These options are not suitable for every structure. Roofs must be able to support the extra weight, waterproofing must be reliable and plants need a way to survive between periods of rainfall. Installation and maintenance costs can also be higher than those of conventional surfaces. For this reason, green infrastructure is often most effective when used selectively rather than treated as a universal solution.

CChanging the colour and properties of surfaces is another strategy. Light-coloured roofs generally reflect more sunlight than dark roofs, reducing the amount of energy they absorb. Special coatings can be applied to some existing buildings without replacing the entire roof. Yet a material that performs well in one setting may be less suitable in another. Reflective surfaces can produce glare, and the benefit may depend on the height and spacing of nearby buildings. Planners should also consider durability: a surface that loses its reflective properties quickly may need frequent replacement, reducing its overall value.

DPublic space offers opportunities to combine cooling with other improvements. A street can include shade trees, drinking-water points, benches and safer crossings, making it more comfortable for people who walk or wait for transport. Parks can provide places to rest during hot weather, but their location matters. A large park on the edge of a city may offer little help to residents who cannot easily reach it. Smaller shaded spaces distributed through neighbourhoods can be useful, especially for people with limited mobility. The design of routes between cool spaces is important too, since a comfortable destination is less accessible if the journey there is exposed and difficult.

EThe benefits of cooling projects may not be shared equally unless authorities consider housing and income. A household with efficient insulation and air conditioning can respond to high temperatures more easily than a household in a poorly ventilated flat. Public buildings such as libraries or community centres may provide temporary relief, but they need suitable opening hours and accessible transport links. Employers can reduce risks by adjusting outdoor work schedules and providing rest breaks. These measures do not replace changes to the built environment, but they can protect people while larger projects take years to complete.

FThere can also be conflicts between short-term needs and long-term plans. A street may need space for delivery vehicles, parking, trees and a safe walking route. Removing parking may create room for shade, but it can concern residents or businesses if alternatives are not considered. Trees may cool a pavement but require maintenance budgets that compete with other public services. Transparent consultation can help authorities understand these concerns, explain the evidence and identify possible compromises. Consultation is most useful when residents can influence the design, rather than being asked to approve a plan after the major decisions have already been made.

GCities should evaluate projects after they are completed. Officials can compare temperatures, observe how people use the space and ask residents whether the changes have improved comfort. They should also check whether trees survive, shelters remain accessible and maintenance is being carried out. A project may look successful at its opening but become less effective if equipment breaks or plants die. Monitoring makes it possible to correct these problems and learn which approaches work under local conditions. It also helps public authorities explain how money has been spent and whether the expected benefits have been achieved.

HThe most resilient neighbourhoods are unlikely to depend on one dramatic solution. They combine building design, vegetation, transport planning, public-health support and regular maintenance. Priorities will differ: a dense commercial district may need shaded walking routes and cooler roofs, while a residential area may benefit most from trees near homes and accessible public buildings. Heat plans must also be flexible enough to respond to changing weather and population needs. By treating cooling as a continuing public responsibility rather than a one-off construction project, cities can reduce risk and make everyday life more comfortable during increasingly frequent periods of extreme heat.