Changes in topography, water chemistry, and gas output all are used to help predict a) volcanic eruptions.
Changes in topography, water chemistry, and gas output are all important indicators used in monitoring and predicting volcanic eruptions. Here's how these factors play a role:
Topography: Monitoring changes in the shape and elevation of the volcano can provide valuable information. Swelling or deformation of the volcano's surface, measured using techniques like GPS and satellite-based interferometry, can indicate the movement and accumulation of magma beneath the surface. Bulges, fissures, or changes in the volcano's shape may suggest increased volcanic activity and the potential for an eruption.
Water Chemistry: Monitoring changes in water chemistry, particularly in geothermal areas or volcanic lakes, can provide insight into volcanic activity. Rising magma can interact with groundwater or surface water, leading to changes in the composition and temperature of the water. An increase in the concentration of certain chemicals, such as sulfur compounds or volcanic gases, can serve as a precursor to an eruption.
Gas Output: Volcanoes emit various gases, including sulfur dioxide (SO2), carbon dioxide (CO2), hydrogen sulfide (H2S), and others. Monitoring changes in the amount and composition of volcanic gases can help assess volcanic activity. Increasing gas emissions, particularly sulfur dioxide, can indicate the movement and ascent of magma towards the surface. Gas measurements can be done using ground-based stations, aerial surveys, or satellite-based remote sensing.
By analyzing these indicators along with other monitoring techniques like seismic activity, ground temperature measurements, and volcanic tremors (which could be referred to as harmonic tremors), scientists and volcanologists can gain a better understanding of volcanic behavior and make informed predictions about potential eruptions. These monitoring systems help in assessing the level of volcanic hazard and providing timely warnings to at-risk populations, aiding in mitigation efforts and ensuring public safety.
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in terrain with steep hill slopes, which crop and cultivation technique will minimize soil erosion?
In terrain with steep hill slopes, contour farming and terracing are cultivation techniques that can minimize soil erosion.
Contour farming involves planting crops along the contour lines of the slope rather than planting in straight rows up and down the slope. This technique helps to slow down the flow of water, reducing erosion by allowing water to infiltrate the soil and reducing the speed of runoff.
Contour farming also helps to create small terraces or ridges that further prevent erosion by capturing and holding the water, allowing it to soak into the soil.
Terracing is another effective technique for minimizing soil erosion on steep slopes. It involves creating flat or gently sloping platforms across the slope, often supported by retaining walls or embankments. These terraces act as barriers to control the flow of water down the slope, reducing the velocity of runoff and preventing erosion. The flat surfaces also provide areas for water to infiltrate and be absorbed by the soil, reducing the amount of runoff.
By implementing contour farming and terracing techniques, farmers can effectively minimize soil erosion on steep hill slopes, protecting the soil and promoting sustainable agriculture practices.
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how can scientists use ice cores (like the one pictured below) to provide the best evidence of global warming?
Ice cores are extracted from glaciers and ice sheets and provide a record of past climate changes. By studying the ice cores, scientists can reconstruct the past atmospheric composition, temperature, precipitation, and other climate variables over hundreds of thousands of years. This provides a clear understanding of the patterns of natural climate change, and the effects of human activities on global warming.
In particular, the ice cores contain air bubbles that provide a record of atmospheric composition, including the concentration of greenhouse gases like carbon dioxide and methane. The ice layers can also reveal temperature changes through the isotopic composition of the ice and the presence of melt layers.
By studying the ice cores, scientists can identify the natural patterns of climate change and compare them to the current warming trend. The results show that current global warming is unprecedented and primarily driven by human activities, particularly the burning of fossil fuels.
In conclusion, ice cores provide valuable evidence of global warming by revealing past climate patterns and atmospheric composition. Studying these records helps scientists understand the extent of human impact on the climate system and develop effective solutions to mitigate the effects of global warming.
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what is the most important geologic agent in eroding, transporting, and depositing sediment?
The most important geologic agent in eroding, transporting, and depositing sediment is water.
Water is a powerful geologic agent that plays a significant role in shaping the Earth's surface through erosion, transportation, and deposition of sediment. Water, in the form of rain, rivers, streams, and ocean waves, exerts a tremendous force on the landscape, constantly reshaping it over time.
Erosion occurs as water wears away rocks and soil, carrying away particles of sediment. Rivers and streams carve through valleys and canyons, while ocean waves pound against coastlines, eroding cliffs and beaches. The force of water, combined with the abrasive action of sediment particles it carries, helps to break down rocks and transport the resulting sediments downstream or along the coast.
Transportation of sediment occurs as water carries the eroded particles downstream. Rivers and streams transport sediments in their flowing water, while ocean currents move sediments along coastlines. The speed and volume of water determine how far and how quickly sediments are transported.
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the altiplano are the high elevation plateaus and basins that lie within even higher mountains.
The Altiplano, also known as the Andean Plateau, is a high-elevation region consisting of plateaus and basins situated between two major mountain ranges, the Andes and the Cordillera Real.
The elevation of the Altiplano ranges from around 3,500 meters (11,500 feet) to 4,500 meters (14,800 feet) above sea level, making it one of the highest inhabited plateaus in the world.
The Altiplano is primarily located in South America, spanning across countries such as Bolivia, Peru, Chile, and Argentina. It is characterized by its diverse ecosystem, varying climate conditions, and unique wildlife. Due to the high elevation, the Altiplano experiences a combination of cold temperatures, high winds, and intense solar radiation. This environment, along with the surrounding mountains, creates a distinct set of challenges for the flora and fauna that inhabit the region.
Despite these harsh conditions, the Altiplano is home to various indigenous communities that have adapted to the high-altitude lifestyle. Agriculture, mining, and herding are some of the primary economic activities in the area, which have shaped the culture and lifestyle of the people living there.
In summary, the Altiplano is a high-elevation plateau characterized by its unique geography, diverse ecosystems, and challenging living conditions. It is situated between even higher mountains, which have significantly influenced its climate, wildlife, and human populations.
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as a stream’s velocity decreases, the larger particles of sediment settle out first.
T/F
It is true as a stream's velocity decreases, the ability of the water to carry sediment decreases, so the larger particles settle out first.
This is known as the principle of sediment sorting, where the largest particles settle out first, followed by progressively smaller particles as the velocity of the water decreases. This process can create distinct layers of sediment in a stream bed, with the largest particles at the bottom and the smallest particles at the top. The settling of sediment is also affected by the size, shape, and density of the particles, as well as the water's turbulence and the slope of the stream channel.
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Is it possible for the vertex of an isosceles triangle to be a right angle? Explain why or why not and state the angle measures of the triangle, if possibe
Answer: No
Explanation:
an isosceles triangle does not always have a right angle. The only properties that a triangle must satisfy to be an isosceles triangle is that it has two sides of equal length, and it has two angles of equal measure.
What agricultural challenges do Africans face, and how do these affect food production in the continent?
What similar challenges do both South Africa and Nigeria face in the future?
Agricultural challenges in Africa include limited access to modern farming technologies, lack of infrastructure, climate change, and poor governance.
These challenges negatively affect food production in the continent by reducing yields and making it difficult to transport and store crops. As a result, many African countries are unable to produce enough food to meet the needs of their growing populations.
Both South Africa and Nigeria face similar challenges in the future, such as increasing population growth, urbanization, and changing dietary habits. These factors are expected to put pressure on food production systems, making it more difficult to meet the food demands of their respective populations.
Additionally, climate change and its impacts, such as droughts and floods, will further exacerbate the existing challenges in the agriculture sector. Addressing these challenges will require significant investments in modern technologies and infrastructure, as well as improving governance and promoting sustainable agricultural practices.
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in the southern hemisphere the westerlies are created by the coriolis effect acting on air moving
T/F
True. The westerlies in the southern hemisphere are created by the Coriolis effect acting on air moving from high pressure to low pressure areas.
The statement is True.
The Coriolis effect is a result of the Earth's rotation on its axis. As the Earth rotates, objects on its surface, including air molecules, are deflected to the right in the northern hemisphere and to the left in the southern hemisphere. This deflection causes the prevailing winds to move in a westerly direction in the southern hemisphere.
The westerlies are one of the major wind systems in the world, along with the trade winds and the polar easterlies. They blow from the west towards the east, and they are strongest between latitudes 40° and 60° south. The westerlies are responsible for the weather patterns in many parts of the world, including the southern hemisphere.
In addition to the Coriolis effect, other factors that contribute to the creation of the westerlies include the temperature gradient between the equator and the poles and the pressure gradient between high and low pressure systems. These factors interact to create a complex system of winds that influence the weather and climate in many parts of the world. Understanding the westerlies and other wind systems is important for predicting weather patterns, as well as for understanding the global climate system.
The statement is True.
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which of the following statements is not true about sub-saharan african cities?
Here are a few statements that are commonly believed to be true about Sub-Saharan African cities:
1. Sub-Saharan African cities have experienced rapid urbanization in recent years, with many people moving from rural areas to urban centers in search of better economic opportunities.
2. Many of these cities are characterized by informal settlements, inadequate infrastructure, and limited access to basic services like clean water, sanitation, and healthcare.
3. Crime and violence are major concerns in many Sub-Saharan African cities, with high rates of theft, robbery, and homicide.
4. Despite these challenges, many cities in the region are also centers of cultural and artistic expression, with vibrant music, art, and fashion scenes.
"Sub-Saharan African cities are all the same" is not true. While there are certainly some commonalities among cities in the region, there is also a great deal of diversity in terms of culture, geography, and development. Some cities, like Lagos and Nairobi, are major economic hubs with bustling business districts and thriving tech industries.
Others, like Dakar and Accra, are known for their vibrant arts and culture scenes. Still others, like Kigali and Addis Ababa, are actively working to improve infrastructure and urban planning in order to make their cities more livable and sustainable. So while there are certainly challenges facing many Sub-Saharan African cities, it's important to recognize the diversity and complexity of the region as well.
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on the eastern side of the rocky mountains, chinook winds are enhanced when ____.
On the eastern side of the Rocky Mountains, Chinook winds are enhanced when the winds are forced to rise over the mountains.
As air is forced to move over the mountains, it is lifted to higher altitudes, where it cools and loses moisture in the form of rain or snow. As the air descends down the leeward side of the mountains, it warms up and becomes drier. This is known as the rain shadow effect. The descending warm and dry air mass picks up speed and becomes a Chinook wind. The Chinook wind can cause a rapid increase in temperature, sometimes by as much as 40°F (22°C), within a few hours. This rapid temperature increase can melt snow rapidly, leading to flooding and other hazards. Despite its potential dangers, Chinook winds are also appreciated for their warming effect during cold winter months.
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Combustion of which of these fossil fuels is/are linked to global warming? a) Oil b) Methane c) Coal d) Allof these e) Natural gas
The combustion of all fossil fuels (oil, methane, coal, and natural gas) is linked to global warming.
When these fuels are burned, they release carbon dioxide and other greenhouse gases into the atmosphere. These gases trap heat from the sun, leading to a warming of the planet. Coal, in particular, is a significant contributor to global warming due to its high carbon content. Methane, which is the primary component of natural gas, is also a potent greenhouse gas that contributes to global warming when it is burned or leaked during production and transportation. Therefore, reducing our reliance on fossil fuels and transitioning to cleaner, renewable energy sources is crucial for mitigating the impacts of global warming and climate change.
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typical weather within the eye of a hurricane consists of question 35 options: large hail. strong winds but clear skies. fair skies and light winds. thunder and lightning. tornadoes.
Fair skies and light winds are typically observed in the eye of a hurricane.
The eye is a relatively calm area at the center of the storm, where sinking air creates clear skies and little to no precipitation. The winds within the eye are also relatively light, although they can change direction suddenly as the eyewall, the area immediately surrounding the eye, rotates around the center. It is important to note that the calm conditions within the eye can be deceptive, as the most intense winds and rainfall occur in the eyewall.
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If the Moon is 3rd quarter phase, what shape does it have in the sky?
A. a quarter circle B. a half circle C. a full circle D. nothing (It is impossible to view a 3rd quarter moon.)
If the Moon is in the 3rd quarter phase, it appears as a half-circle shape in the sky. The answer is B.
A quarter phase occurs when the Moon has completed 25% of its orbit around the Earth, while a half phase happens when it has completed 50% of its orbit.
Therefore, when the Moon is in the 3rd quarter phase, it has completed about 75% of its orbit, and the illuminated portion of the Moon that is visible from Earth appears as a half-circle shape.
This is because half of the Moon is illuminated by the Sun, while the other half is in shadow, causing a clear line of separation between the light and dark portions of the Moon. The 3rd quarter phase occurs after the Full Moon phase and before the New Moon phase. Thus, B. a half circle is the correct option.
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which landform in canada, located along the hudson bay, is rich in minerals?
Answer:
The Canadian Shield is one of the world's richest areas in terms of mineral ores. It is filled with substantial deposits of nickel, gold, silver, and copper. Throughout the Shield there are many mining towns extracting these minerals
Which of the following locations in the U.S. has the lowest risk of wildfires? A) California B) New Mexico C) Maine D) Alaska.
The location in the US that has the lowest risk of wildfires is Maine. Therefore, the answer is Option C.
A wildfire is generally a large, uncontrollable fire that burns in forests, grassland, and vegetation. The most frequent cause of wildfires is lightning. It can also be caused by dry vegetation, doughtiness, etc.
In the US, the area that has the lowest risk of wildfires are Maine, Ohio, Maryland, Vermont, Rhode Island, etc. Whereas, the areas with highest the risk of wildfires are California, Washington, Alaska, Texas, Utah, etc.
Wildfires produce harmful air pollutants. It can also lead to the loss of crops, animals, and property. It can also disrupt transportation, communications, and water supply.
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which four states account for 91% of all u.s. earthquakes of magnitude 3.5 and above?
California, Alaska, Oklahoma, and Nevada account for 91% of all earthquakes of magnitude 3.5 and above in the United States.
The United States experiences thousands of earthquakes every year, but the vast majority of these are relatively small and go unnoticed by most people. However, earthquakes of magnitude 3.5 and above are typically felt by people and can cause minor damage. Four states - California, Alaska, Oklahoma, and Nevada - account for the majority of these earthquakes, with 91% of all such earthquakes occurring in these states.
California is by far the most seismically active state in the U.S., accounting for over two-thirds of all earthquakes of magnitude 3.5 and above. This is due to the state's location on the Pacific Plate boundary, where the plate is sliding past the North American Plate, causing frequent earthquakes. Alaska is another highly seismically active state, due to its location on the boundary between the Pacific and North American Plates. Oklahoma has experienced a surge in seismic activity in recent years, largely due to the injection of wastewater from oil and gas drilling activities. Finally, Nevada experiences frequent earthquakes due to its location near the boundary between the Pacific and North American Plates.
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a part of the original rough surface intentionally left on a stone by a cutter is
A part of the original rough surface intentionally left on a stone by a cutter is called a "nail mark."
This is a small indentation or bump that remains on the surface of the stone after it has been worked by the cutter. The purpose of leaving nail marks on a stone is to provide a key for mortar or other bonding agents to adhere to when the stone is used in construction. Nail marks also help to ensure that stones are properly aligned and placed in the correct position during construction. Nail marks can be found on many types of stones, including granite, marble, and sandstone.
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which layer of earth is the thickest (as opposed to the densest)?
Answer: Mantle is the thickest at about 2900 km
Explanation:
the sierra nevada batholith formed during subduction of the _____ plate beneath north america.
The Sierra Nevada batholith formed during the subduction of the Farallon plate beneath North America. This process occurred during the Mesozoic era, specifically during the Late Jurassic to Early Cretaceous period, approximately 150 to 80 million years ago.
As the Farallon plate subducted beneath North America, it generated heat and pressure that led to the melting of the mantle beneath the continental crust. This molten rock, or magma, rose to the surface and cooled, forming the Sierra Nevada batholith. The batholith is a massive, dome-shaped rock formation that extends for approximately 400 miles through eastern California.
It is composed of granitic rocks and is thought to be one of the largest batholiths in the world. The Sierra Nevada batholith played a significant role in shaping the landscape of California, including the formation of the Yosemite Valley and the Sierra Nevada mountain range.
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the soil-forming factor which is said to make soil more than "just dirt" is the ________ factor.
Answer: The soil-forming factor which is said to make soil more than "just dirt" is the biological factor.
Rocks and sand on beaches become rounded rapidly because ________.
Rocks and sand on beaches become rounded rapidly because of the process known as attrition.
Attrition is defined as the process of hitting and knocking of rocks and stones against each other when they get carried by the waves on the beach. Due to this process of continuous hitting and knocking, the rocks and stones present in sand become round in shape.
The term attrition is related to erosion by destructive waves and destructive waves are related to coastal erosion. Coastal erosion occurs due to destructive waves. Destructive ways cause erosion through four processes : attrition, compression, abrasion and hydraulic action.
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What is the difference between cultural assimilation and the social structural model?
While cultural assimilation involves the adoption of a dominant culture by a minority group, the social structural model focuses on the influence of broader societal structures on individuals and groups.
Cultural assimilation refers to the process of adopting the cultural norms, values, and practices of the dominant group in society. It involves individuals or groups of different cultural backgrounds merging their cultural identities into the dominant group, often resulting in a loss of their original culture. The process of assimilation can happen voluntarily or forcibly and can take place in various settings, such as in schools, workplaces, or within a community.
On the other hand, the social structural model focuses on the impact of social structures on individuals and groups, such as the influence of economic systems, political institutions, and societal norms. This model emphasizes that social structures shape individuals' experiences and opportunities, and that change in these structures is necessary for social transformation.
These two concepts are related but distinct and provide different lenses through which to view social and cultural change.
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What region of the U.S. is known for its bean dishes, in particular baked beans and bean pot? A. New England B. South C. West D. Midwest.
The region of the U.S. that is known for its bean dishes, especially baked beans and bean pot, is A. New England.
New England is a region located in the northeastern part of the United States, comprising six states: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.
Baked beans are a staple of traditional New England cuisine and are often served at summer barbecues and other outdoor gatherings. The dish consists of navy beans that are slow-cooked with molasses and pork, giving them a sweet and savory flavor. Bean pots, which are earthenware pots used for cooking beans, are also a popular item in this region.
Therefore , the correct answer is option A.
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the main reason that the deposits shown here are sorted and stratified is that:
The deposits shown in the geological record are sorted and stratified because of the processes of sedimentation and erosion.
As sediment settles and accumulates in a particular area, it creates layers or strata, with the older layers at the bottom and newer layers on top. These layers can be composed of different materials, such as sand, silt, and clay, which may have different colors, textures, and mineral compositions the sorting of the sediment depends on the size and weight of the particles, as well as the energy of the transporting medium, such as water or wind. Heavier and larger particles tend to settle faster and closer to the source, while lighter and smaller particles can be carried further and deposited farther away. This leads to the formation of different layers or beds of sediment, which can be distinguished by their characteristics.
Stratification is important in geology because it provides a record of the history of the Earth's surface and the processes that have shaped it. By studying the different layers and their properties, scientists can reconstruct past environments, climates, and events, and develop models of how the Earth has changed over time. This information can also be used for resource exploration and management, as well as hazard assessment and mitigation.
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the rock debris which accumulates at the base of steep slopes by gravitational action is called
The rock debris that accumulates at the base of steep slopes due to gravitational action is called talus.
Talus is composed of fragments of rocks of various sizes and shapes, ranging from small pebbles to large boulders. Talus is formed by weathering, erosion, and gravity acting on rocks at the top of the slope. The rock fragments break off from the main rock mass due to the physical or chemical weathering, and then slide or roll down the slope, accumulating at the bottom. Talus slopes are common in mountainous regions and can be hazardous to climbers and hikers.
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Moving toward the southwestern border of the United States, Spanish is increasingly spoken in addition to English. What type of region this gradual change of language reflect?
A. Formal
B. Functional
C. Vernacular D. Geo-linguistic
E. Bilingual
Which of the examples below shows how carbon moves from the geosphere directly to the atmosphere?
a. During photosynthesis, plants absorb carbon dioxide.
b Carbon dioxide combines with water vapor to make carbonic acid, which rains and weathers rocks on Earthâs crust.
c. When land animals die, they release carbon dioxide into the atmosphere.
d. When certain small marine organisms die, their calcium carbonate skeletons fall to the ocean floor and eventually become sedimentary rock.
e. The burning of fossil fuels (e.g., coal) releases carbon dioxide directly into the atmosphere.
The correct option is (e) The burning of fossil fuels (e.g., coal) releases carbon dioxide directly into the atmosphere.
Fossil fuels are formed from the remains of dead organisms (e.g., plants) that were buried under sediment millions of years ago. When these fossil fuels are burned, the carbon that was stored in them is released as carbon dioxide gas into the atmosphere. This is a direct transfer of carbon from the geosphere (fossil fuels) to the atmosphere. Other options describe carbon cycles that involve intermediate steps or reservoirs, such as photosynthesis in plants (biosphere), weathering of rocks (geosphere), and formation of sedimentary rock (geosphere).
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Agroforestry management plan focuses on?
hurricanes develop as a result of the convergence of air masses with different physical characteristics. question 39 options: true false
This statement is false as Hurricanes do not develop as a result of the convergence of air masses with different physical characteristics.
Instead, hurricanes develop over warm ocean waters when atmospheric conditions are favorable, including warm sea surface temperatures, low vertical wind shear, and high humidity. As the warm ocean water evaporates, it releases latent heat into the atmosphere, creating an area of low pressure. This low pressure area then draws in surrounding air, which rises and cools, releasing more heat and moisture. As the air continues to rise, it causes the wind to rotate, forming the characteristic spiral shape of a hurricane. Therefore, the convergence of air masses is not the primary cause of hurricane formation.
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what are the different types of deep foundations? what are the typical ranges of capacity for these deep foundations? for sand deposit which foundation will you recommend? for clay soils which foundation will you recommend
Different types of deep foundations include driven piles, drilled shafts (also known as bored piles), and caissons.
The capacity of deep foundations can vary widely depending on factors such as soil conditions and structural requirements. However, typical ranges of capacity for deep foundations can range from a few hundred kilonewtons (kN) to several thousand kN.
For sand deposits, a driven pile foundation is often recommended. Driven piles are effective in sandy soils as they can penetrate through loose layers and reach more stable soil layers, providing a reliable load-bearing capacity.
For clay soils, drilled shafts or bored piles are commonly recommended. These deep foundations can withstand the cohesive properties of clay and are effective in transferring loads through the clay layer to more competent strata, ensuring stability and structural support. The diameter and length of the drilled shafts or bored piles can be customized based on the specific soil conditions and required load-bearing capacity.
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